diff --git a/Delta.xcodeproj/project.pbxproj b/Delta.xcodeproj/project.pbxproj
index 29744c4..dbcbb81 100644
--- a/Delta.xcodeproj/project.pbxproj
+++ b/Delta.xcodeproj/project.pbxproj
@@ -133,6 +133,7 @@
 		BFE56E1923EB7BE00014FECD /* UIImage+SymbolFallback.swift in Sources */ = {isa = PBXBuildFile; fileRef = BFE56E1823EB7BE00014FECD /* UIImage+SymbolFallback.swift */; };
 		BFE593CA21F3F8B7003412A6 /* GameSave.swift in Sources */ = {isa = PBXBuildFile; fileRef = BFE593C921F3F8B7003412A6 /* GameSave.swift */; };
 		BFE593CC21F3F8C2003412A6 /* _GameSave.swift in Sources */ = {isa = PBXBuildFile; fileRef = BFE593CB21F3F8C2003412A6 /* _GameSave.swift */; };
+		BFE9908024451E15006409A7 /* MelonDSCoreSettingsViewController.swift in Sources */ = {isa = PBXBuildFile; fileRef = BFE9907F24451E15006409A7 /* MelonDSCoreSettingsViewController.swift */; };
 		BFEE943D23F2180200CDA07D /* Delta4ToDelta5.xcmappingmodel in Sources */ = {isa = PBXBuildFile; fileRef = BFEE943C23F2180200CDA07D /* Delta4ToDelta5.xcmappingmodel */; };
 		BFEF24F31F7DD4FD00454C62 /* SaveStateMigrationPolicy.swift in Sources */ = {isa = PBXBuildFile; fileRef = BFEF24F21F7DD4FB00454C62 /* SaveStateMigrationPolicy.swift */; };
 		BFF6452E1F7CC5060056533E /* GameControllerInputMappingTransformer.swift in Sources */ = {isa = PBXBuildFile; fileRef = BF6B82A41F7CC2A300042BFB /* GameControllerInputMappingTransformer.swift */; };
@@ -293,6 +294,7 @@
 		BFE56E1823EB7BE00014FECD /* UIImage+SymbolFallback.swift */ = {isa = PBXFileReference; lastKnownFileType = sourcecode.swift; path = "UIImage+SymbolFallback.swift"; sourceTree = "<group>"; };
 		BFE593C921F3F8B7003412A6 /* GameSave.swift */ = {isa = PBXFileReference; fileEncoding = 4; lastKnownFileType = sourcecode.swift; path = GameSave.swift; sourceTree = "<group>"; };
 		BFE593CB21F3F8C2003412A6 /* _GameSave.swift */ = {isa = PBXFileReference; fileEncoding = 4; lastKnownFileType = sourcecode.swift; path = _GameSave.swift; sourceTree = "<group>"; };
+		BFE9907F24451E15006409A7 /* MelonDSCoreSettingsViewController.swift */ = {isa = PBXFileReference; lastKnownFileType = sourcecode.swift; path = MelonDSCoreSettingsViewController.swift; sourceTree = "<group>"; };
 		BFEC732C1AAECC4A00650035 /* Roxas.framework */ = {isa = PBXFileReference; explicitFileType = wrapper.framework; path = Roxas.framework; sourceTree = BUILT_PRODUCTS_DIR; };
 		BFEE943C23F2180200CDA07D /* Delta4ToDelta5.xcmappingmodel */ = {isa = PBXFileReference; lastKnownFileType = wrapper.xcmappingmodel; path = Delta4ToDelta5.xcmappingmodel; sourceTree = "<group>"; };
 		BFEF24F21F7DD4FB00454C62 /* SaveStateMigrationPolicy.swift */ = {isa = PBXFileReference; lastKnownFileType = sourcecode.swift; path = SaveStateMigrationPolicy.swift; sourceTree = "<group>"; };
@@ -348,7 +350,6 @@
 				BF5942901E09BD1A0051894B /* NSFetchedResultsController+Conveniences.m */,
 				BF5942911E09BD1A0051894B /* NSManagedObject+Conveniences.swift */,
 				BF5942921E09BD1A0051894B /* NSManagedObjectContext+Conveniences.swift */,
-				BFBAB2E21EB685A2004E0B0E /* DeltaCoreProtocol+Delta.swift */,
 				BF18B61E1E2985F900F70067 /* UIAlertController+Importing.swift */,
 				BFC6F7B71F435BC500221B96 /* Input+Display.swift */,
 				BF6424841F5CBDC900D6AB44 /* UIView+ParentViewController.swift */,
@@ -606,6 +607,7 @@
 			isa = PBXGroup;
 			children = (
 				BF4828851F9028F500028B97 /* System.swift */,
+				BFBAB2E21EB685A2004E0B0E /* DeltaCoreProtocol+Delta.swift */,
 			);
 			path = Systems;
 			sourceTree = "<group>";
@@ -666,6 +668,7 @@
 				BF5E7F451B9A652600AE44F8 /* Settings.storyboard */,
 				BF5E7F431B9A650B00AE44F8 /* SettingsViewController.swift */,
 				BFB3645723245A6000CD0EB1 /* LicensesViewController.swift */,
+				BFE9907E24451DE6006409A7 /* Cores */,
 				BF71CF851FE8FFF1001F1613 /* App Icon Shortcuts */,
 				BF11734E1DA32CEC00047DF8 /* Controllers */,
 				BF1DAD5B1D9F574900E752A7 /* Controller Skins */,
@@ -706,6 +709,14 @@
 			path = "Popover Menu";
 			sourceTree = "<group>";
 		};
+		BFE9907E24451DE6006409A7 /* Cores */ = {
+			isa = PBXGroup;
+			children = (
+				BFE9907F24451E15006409A7 /* MelonDSCoreSettingsViewController.swift */,
+			);
+			path = Cores;
+			sourceTree = "<group>";
+		};
 		BFEC732F1AAECCBD00650035 /* Resources */ = {
 			isa = PBXGroup;
 			children = (
@@ -1110,6 +1121,7 @@
 				BF1173501DA32CF600047DF8 /* ControllersSettingsViewController.swift in Sources */,
 				BFFC461E1D59823500AF2CC6 /* GamesPresentationController.swift in Sources */,
 				BF99A5971DC2F9C400468E9E /* ControllerSkinTableViewCell.swift in Sources */,
+				BFE9908024451E15006409A7 /* MelonDSCoreSettingsViewController.swift in Sources */,
 				BF5942861E09BC8B0051894B /* _Cheat.swift in Sources */,
 				BF5E7F441B9A650B00AE44F8 /* SettingsViewController.swift in Sources */,
 				BF8CA9361F5F651900499FDD /* PopoverMenuController.swift in Sources */,
diff --git a/Delta/Base.lproj/Main.storyboard b/Delta/Base.lproj/Main.storyboard
index ec83268..f5f1dc9 100644
--- a/Delta/Base.lproj/Main.storyboard
+++ b/Delta/Base.lproj/Main.storyboard
@@ -1,9 +1,9 @@
 <?xml version="1.0" encoding="UTF-8"?>
-<document type="com.apple.InterfaceBuilder3.CocoaTouch.Storyboard.XIB" version="3.0" toolsVersion="15705" targetRuntime="iOS.CocoaTouch" propertyAccessControl="none" useAutolayout="YES" useTraitCollections="YES" colorMatched="YES" initialViewController="SPq-Bk-fQl">
+<document type="com.apple.InterfaceBuilder3.CocoaTouch.Storyboard.XIB" version="3.0" toolsVersion="16096" targetRuntime="iOS.CocoaTouch" propertyAccessControl="none" useAutolayout="YES" useTraitCollections="YES" colorMatched="YES" initialViewController="SPq-Bk-fQl">
     <device id="retina4_7" orientation="portrait" appearance="light"/>
     <dependencies>
         <deployment identifier="iOS"/>
-        <plugIn identifier="com.apple.InterfaceBuilder.IBCocoaTouchPlugin" version="15706"/>
+        <plugIn identifier="com.apple.InterfaceBuilder.IBCocoaTouchPlugin" version="16086"/>
         <capability name="documents saved in the Xcode 8 format" minToolsVersion="8.0"/>
     </dependencies>
     <scenes>
@@ -84,6 +84,7 @@
                         <segue destination="X2o-q6-XD5" kind="unwind" identifier="unwindFromGames" unwindAction="unwindFromGamesViewControllerWith:" id="k8C-Xn-maU"/>
                         <segue destination="MPk-bF-nkj" kind="presentation" identifier="saveStates" customClass="SaveStatesStoryboardSegue" customModule="Delta" customModuleProvider="target" id="1Xp-2J-0cq"/>
                         <segue destination="qdE-gb-V2e" kind="presentation" identifier="preferredControllerSkins" id="i6y-cP-3WM"/>
+                        <segue destination="V2x-v0-jWm" kind="presentation" identifier="showDSSettings" id="kuV-tY-Y0B"/>
                     </connections>
                 </collectionViewController>
                 <placeholder placeholderIdentifier="IBFirstResponder" id="bW1-t8-idm" userLabel="First Responder" sceneMemberID="firstResponder"/>
@@ -265,11 +266,37 @@
             </objects>
             <point key="canvasLocation" x="2652" y="2394"/>
         </scene>
+        <!--Navigation Controller-->
+        <scene sceneID="OW2-zT-pbF">
+            <objects>
+                <navigationController id="V2x-v0-jWm" sceneMemberID="viewController">
+                    <navigationBar key="navigationBar" contentMode="scaleToFill" insetsLayoutMarginsFromSafeArea="NO" id="pjb-4I-yar">
+                        <rect key="frame" x="0.0" y="0.0" width="375" height="56"/>
+                        <autoresizingMask key="autoresizingMask"/>
+                    </navigationBar>
+                    <connections>
+                        <segue destination="cFV-KV-B18" kind="relationship" relationship="rootViewController" id="VBP-fg-oNH"/>
+                    </connections>
+                </navigationController>
+                <placeholder placeholderIdentifier="IBFirstResponder" id="Jo9-gl-p5p" userLabel="First Responder" customClass="UIResponder" sceneMemberID="firstResponder"/>
+            </objects>
+            <point key="canvasLocation" x="2652" y="3085"/>
+        </scene>
+        <!--dsSettingsViewController-->
+        <scene sceneID="anM-Cb-BaB">
+            <objects>
+                <viewControllerPlaceholder storyboardName="Settings" referencedIdentifier="dsSettingsViewController" id="cFV-KV-B18" sceneMemberID="viewController">
+                    <navigationItem key="navigationItem" id="Dkm-Hm-sQa"/>
+                </viewControllerPlaceholder>
+                <placeholder placeholderIdentifier="IBFirstResponder" id="IS2-hO-HBN" userLabel="First Responder" customClass="UIResponder" sceneMemberID="firstResponder"/>
+            </objects>
+            <point key="canvasLocation" x="3258" y="3084"/>
+        </scene>
     </scenes>
-    <resources>
-        <image name="SettingsButton" width="22" height="22"/>
-    </resources>
     <inferredMetricsTieBreakers>
         <segue reference="Tey-6Z-UHp"/>
     </inferredMetricsTieBreakers>
+    <resources>
+        <image name="SettingsButton" width="22" height="22"/>
+    </resources>
 </document>
diff --git a/Delta/Base.lproj/Settings.storyboard b/Delta/Base.lproj/Settings.storyboard
index e97a4aa..8f55dd4 100644
--- a/Delta/Base.lproj/Settings.storyboard
+++ b/Delta/Base.lproj/Settings.storyboard
@@ -1,9 +1,9 @@
 <?xml version="1.0" encoding="UTF-8"?>
-<document type="com.apple.InterfaceBuilder3.CocoaTouch.Storyboard.XIB" version="3.0" toolsVersion="15705" targetRuntime="iOS.CocoaTouch" propertyAccessControl="none" useAutolayout="YES" useTraitCollections="YES" colorMatched="YES" initialViewController="ssH-mM-uG6">
+<document type="com.apple.InterfaceBuilder3.CocoaTouch.Storyboard.XIB" version="3.0" toolsVersion="16096" targetRuntime="iOS.CocoaTouch" propertyAccessControl="none" useAutolayout="YES" useTraitCollections="YES" colorMatched="YES" initialViewController="ssH-mM-uG6">
     <device id="retina4_7" orientation="portrait" appearance="light"/>
     <dependencies>
         <deployment identifier="iOS"/>
-        <plugIn identifier="com.apple.InterfaceBuilder.IBCocoaTouchPlugin" version="15706"/>
+        <plugIn identifier="com.apple.InterfaceBuilder.IBCocoaTouchPlugin" version="16087"/>
         <capability name="Named colors" minToolsVersion="9.0"/>
         <capability name="Safe area layout guides" minToolsVersion="9.0"/>
         <capability name="documents saved in the Xcode 8 format" minToolsVersion="8.0"/>
@@ -18,7 +18,7 @@
                         <autoresizingMask key="autoresizingMask" widthSizable="YES" heightSizable="YES"/>
                         <color key="backgroundColor" red="0.93725490199999995" green="0.93725490199999995" blue="0.95686274510000002" alpha="1" colorSpace="custom" customColorSpace="sRGB"/>
                         <label key="tableFooterView" opaque="NO" userInteractionEnabled="NO" contentMode="left" horizontalHuggingPriority="251" verticalHuggingPriority="251" text="Delta 0.6.0" textAlignment="center" lineBreakMode="tailTruncation" baselineAdjustment="alignBaselines" adjustsFontSizeToFit="NO" id="Str-BY-agW">
-                            <rect key="frame" x="0.0" y="1376.5" width="375" height="44"/>
+                            <rect key="frame" x="0.0" y="1455.5" width="375" height="44"/>
                             <autoresizingMask key="autoresizingMask" flexibleMaxX="YES" flexibleMaxY="YES"/>
                             <fontDescription key="fontDescription" type="system" pointSize="17"/>
                             <color key="textColor" white="0.5" alpha="1" colorSpace="calibratedWhite"/>
@@ -411,10 +411,38 @@
                                     </tableViewCell>
                                 </cells>
                             </tableViewSection>
+                            <tableViewSection headerTitle="Core Settings" footerTitle="Manage settings for individual emulation cores." id="1eN-id-M8c">
+                                <cells>
+                                    <tableViewCell clipsSubviews="YES" contentMode="scaleToFill" selectionStyle="default" accessoryType="disclosureIndicator" indentationWidth="10" reuseIdentifier="Cell" textLabel="zeg-kj-CMN" detailTextLabel="CFd-fn-r0t" style="IBUITableViewCellStyleValue1" id="lxX-Hz-sXl">
+                                        <rect key="frame" x="0.0" y="1209.5" width="375" height="44"/>
+                                        <autoresizingMask key="autoresizingMask"/>
+                                        <tableViewCellContentView key="contentView" opaque="NO" clipsSubviews="YES" multipleTouchEnabled="YES" contentMode="center" tableViewCell="lxX-Hz-sXl" id="OWw-OH-9F5">
+                                            <rect key="frame" x="0.0" y="0.0" width="356" height="44"/>
+                                            <autoresizingMask key="autoresizingMask"/>
+                                            <subviews>
+                                                <label opaque="NO" multipleTouchEnabled="YES" contentMode="left" text="Nintendo DS" textAlignment="natural" lineBreakMode="tailTruncation" baselineAdjustment="alignBaselines" adjustsFontSizeToFit="NO" id="zeg-kj-CMN">
+                                                    <rect key="frame" x="15" y="12" width="97" height="20.5"/>
+                                                    <autoresizingMask key="autoresizingMask" flexibleMaxX="YES" flexibleMaxY="YES"/>
+                                                    <fontDescription key="fontDescription" type="system" pointSize="17"/>
+                                                    <color key="textColor" red="0.0" green="0.0" blue="0.0" alpha="1" colorSpace="custom" customColorSpace="sRGB"/>
+                                                    <nil key="highlightedColor"/>
+                                                </label>
+                                                <label opaque="NO" multipleTouchEnabled="YES" contentMode="left" insetsLayoutMarginsFromSafeArea="NO" text="melonDS" textAlignment="right" lineBreakMode="tailTruncation" baselineAdjustment="alignBaselines" adjustsFontSizeToFit="NO" id="CFd-fn-r0t">
+                                                    <rect key="frame" x="278.5" y="12" width="69.5" height="20.5"/>
+                                                    <autoresizingMask key="autoresizingMask"/>
+                                                    <fontDescription key="fontDescription" type="system" pointSize="17"/>
+                                                    <color key="textColor" white="0.5" alpha="1" colorSpace="custom" customColorSpace="genericGamma22GrayColorSpace"/>
+                                                    <nil key="highlightedColor"/>
+                                                </label>
+                                            </subviews>
+                                        </tableViewCellContentView>
+                                    </tableViewCell>
+                                </cells>
+                            </tableViewSection>
                             <tableViewSection headerTitle="Patreon" footerTitle="Receive early access to new features and more by becoming a patron." id="QvT-Yt-oP1">
                                 <cells>
                                     <tableViewCell clipsSubviews="YES" contentMode="scaleToFill" selectionStyle="default" accessoryType="disclosureIndicator" indentationWidth="10" reuseIdentifier="Cell" textLabel="faT-qa-JP0" style="IBUITableViewCellStyleDefault" id="4it-3L-j8P">
-                                        <rect key="frame" x="0.0" y="1209.5" width="375" height="44"/>
+                                        <rect key="frame" x="0.0" y="1329" width="375" height="44"/>
                                         <autoresizingMask key="autoresizingMask"/>
                                         <tableViewCellContentView key="contentView" opaque="NO" clipsSubviews="YES" multipleTouchEnabled="YES" contentMode="center" tableViewCell="4it-3L-j8P" id="7dE-36-hzp">
                                             <rect key="frame" x="0.0" y="0.0" width="356" height="44"/>
@@ -435,7 +463,7 @@
                             <tableViewSection headerTitle="Credits" id="foh-L9-g6W">
                                 <cells>
                                     <tableViewCell clipsSubviews="YES" contentMode="scaleToFill" selectionStyle="default" accessoryType="disclosureIndicator" indentationWidth="10" reuseIdentifier="DetailCell" textLabel="Pum-dL-hGn" detailTextLabel="WQ6-m7-zhh" style="IBUITableViewCellStyleValue1" id="BU4-ee-DGz">
-                                        <rect key="frame" x="0.0" y="1337.5" width="375" height="44"/>
+                                        <rect key="frame" x="0.0" y="1457" width="375" height="44"/>
                                         <autoresizingMask key="autoresizingMask"/>
                                         <tableViewCellContentView key="contentView" opaque="NO" clipsSubviews="YES" multipleTouchEnabled="YES" contentMode="center" tableViewCell="BU4-ee-DGz" id="fWf-gm-1sf">
                                             <rect key="frame" x="0.0" y="0.0" width="356" height="44"/>
@@ -459,7 +487,7 @@
                                         </tableViewCellContentView>
                                     </tableViewCell>
                                     <tableViewCell clipsSubviews="YES" contentMode="scaleToFill" selectionStyle="default" accessoryType="disclosureIndicator" indentationWidth="10" reuseIdentifier="DetailCell" textLabel="gWx-Xn-5Nf" detailTextLabel="09x-GX-cpy" style="IBUITableViewCellStyleValue1" id="8qc-0t-Nte">
-                                        <rect key="frame" x="0.0" y="1381.5" width="375" height="44"/>
+                                        <rect key="frame" x="0.0" y="1501" width="375" height="44"/>
                                         <autoresizingMask key="autoresizingMask"/>
                                         <tableViewCellContentView key="contentView" opaque="NO" clipsSubviews="YES" multipleTouchEnabled="YES" contentMode="center" tableViewCell="8qc-0t-Nte" id="jUL-fL-i0n">
                                             <rect key="frame" x="0.0" y="0.0" width="356" height="44"/>
@@ -483,7 +511,7 @@
                                         </tableViewCellContentView>
                                     </tableViewCell>
                                     <tableViewCell clipsSubviews="YES" contentMode="scaleToFill" selectionStyle="default" accessoryType="disclosureIndicator" indentationWidth="10" reuseIdentifier="DetailCell" textLabel="zro-BX-EY9" detailTextLabel="e45-FD-ug2" style="IBUITableViewCellStyleValue1" id="Zh9-JJ-jEQ">
-                                        <rect key="frame" x="0.0" y="1425.5" width="375" height="44"/>
+                                        <rect key="frame" x="0.0" y="1545" width="375" height="44"/>
                                         <autoresizingMask key="autoresizingMask"/>
                                         <tableViewCellContentView key="contentView" opaque="NO" clipsSubviews="YES" multipleTouchEnabled="YES" contentMode="center" tableViewCell="Zh9-JJ-jEQ" id="VCc-oJ-ODB">
                                             <rect key="frame" x="0.0" y="0.0" width="356" height="44"/>
@@ -507,7 +535,7 @@
                                         </tableViewCellContentView>
                                     </tableViewCell>
                                     <tableViewCell clipsSubviews="YES" contentMode="scaleToFill" selectionStyle="default" accessoryType="disclosureIndicator" indentationWidth="10" reuseIdentifier="DetailCell" textLabel="2K3-IL-94S" style="IBUITableViewCellStyleDefault" id="j7p-ZK-mHq">
-                                        <rect key="frame" x="0.0" y="1469.5" width="375" height="44"/>
+                                        <rect key="frame" x="0.0" y="1589" width="375" height="44"/>
                                         <autoresizingMask key="autoresizingMask"/>
                                         <tableViewCellContentView key="contentView" opaque="NO" clipsSubviews="YES" multipleTouchEnabled="YES" contentMode="center" tableViewCell="j7p-ZK-mHq" id="BqT-yP-OpS">
                                             <rect key="frame" x="0.0" y="0.0" width="356" height="44"/>
@@ -550,6 +578,7 @@
                         <outlet property="versionLabel" destination="Str-BY-agW" id="gU2-L0-pYt"/>
                         <segue destination="uBz-mm-mXr" kind="show" identifier="controllersSegue" id="MLY-hF-UB8"/>
                         <segue destination="56e-ul-z6v" kind="show" identifier="controllerSkinsSegue" id="GNM-Gt-YFf"/>
+                        <segue destination="OwL-4c-EEA" kind="show" identifier="dsSettingsSegue" id="HCa-Ti-ENb"/>
                     </connections>
                 </tableViewController>
                 <placeholder placeholderIdentifier="IBFirstResponder" id="19F-9T-esM" userLabel="First Responder" sceneMemberID="firstResponder"/>
@@ -1247,7 +1276,7 @@
                                             <rect key="frame" x="0.0" y="0.0" width="375" height="44"/>
                                             <autoresizingMask key="autoresizingMask"/>
                                             <subviews>
-                                                <switch opaque="NO" contentMode="scaleToFill" horizontalHuggingPriority="750" verticalHuggingPriority="750" ambiguous="YES" contentHorizontalAlignment="center" contentVerticalAlignment="center" on="YES" translatesAutoresizingMaskIntoConstraints="NO" id="K0v-VD-uUj">
+                                                <switch opaque="NO" contentMode="scaleToFill" horizontalHuggingPriority="750" verticalHuggingPriority="750" contentHorizontalAlignment="center" contentVerticalAlignment="center" on="YES" translatesAutoresizingMaskIntoConstraints="NO" id="K0v-VD-uUj">
                                                     <rect key="frame" x="163" y="6" width="49" height="31"/>
                                                     <autoresizingMask key="autoresizingMask" flexibleMaxX="YES" flexibleMaxY="YES"/>
                                                     <color key="onTintColor" name="Purple"/>
@@ -1661,7 +1690,232 @@ Delta uses OpenVGDB to provide automatic artwork for imported games.</string>
                 </viewController>
                 <placeholder placeholderIdentifier="IBFirstResponder" id="DdV-4s-jQT" userLabel="First Responder" sceneMemberID="firstResponder"/>
             </objects>
-            <point key="canvasLocation" x="2513" y="2606"/>
+            <point key="canvasLocation" x="2513" y="3400"/>
+        </scene>
+        <!--DS Settings-->
+        <scene sceneID="rRC-R2-Ico">
+            <objects>
+                <tableViewController storyboardIdentifier="dsSettingsViewController" title="DS Settings" id="OwL-4c-EEA" customClass="MelonDSCoreSettingsViewController" customModule="Delta" customModuleProvider="target" sceneMemberID="viewController">
+                    <tableView key="view" clipsSubviews="YES" contentMode="scaleToFill" alwaysBounceVertical="YES" dataMode="static" style="grouped" separatorStyle="default" rowHeight="44" sectionHeaderHeight="18" sectionFooterHeight="18" id="ops-m1-tlV">
+                        <rect key="frame" x="0.0" y="0.0" width="375" height="667"/>
+                        <autoresizingMask key="autoresizingMask" widthSizable="YES" heightSizable="YES"/>
+                        <color key="backgroundColor" cocoaTouchSystemColor="groupTableViewBackgroundColor"/>
+                        <sections>
+                            <tableViewSection headerTitle="Core Info" footerTitle="" id="ozc-x3-LhT">
+                                <cells>
+                                    <tableViewCell clipsSubviews="YES" contentMode="scaleToFill" selectionStyle="gray" accessoryType="disclosureIndicator" indentationWidth="10" reuseIdentifier="Cell" textLabel="kYg-4f-oTo" detailTextLabel="yak-dZ-uPc" style="IBUITableViewCellStyleValue1" id="pis-Uj-SZd">
+                                        <rect key="frame" x="0.0" y="55.5" width="375" height="44"/>
+                                        <autoresizingMask key="autoresizingMask"/>
+                                        <tableViewCellContentView key="contentView" opaque="NO" clipsSubviews="YES" multipleTouchEnabled="YES" contentMode="center" tableViewCell="pis-Uj-SZd" id="yvW-Vf-otU">
+                                            <rect key="frame" x="0.0" y="0.0" width="348" height="44"/>
+                                            <autoresizingMask key="autoresizingMask"/>
+                                            <subviews>
+                                                <label opaque="NO" multipleTouchEnabled="YES" contentMode="left" text="Name" textAlignment="natural" lineBreakMode="tailTruncation" baselineAdjustment="alignBaselines" adjustsFontSizeToFit="NO" id="kYg-4f-oTo">
+                                                    <rect key="frame" x="16" y="12" width="45" height="20.5"/>
+                                                    <autoresizingMask key="autoresizingMask"/>
+                                                    <fontDescription key="fontDescription" type="system" pointSize="17"/>
+                                                    <color key="textColor" cocoaTouchSystemColor="darkTextColor"/>
+                                                    <nil key="highlightedColor"/>
+                                                </label>
+                                                <label opaque="NO" multipleTouchEnabled="YES" contentMode="left" insetsLayoutMarginsFromSafeArea="NO" text="melonDS" textAlignment="right" lineBreakMode="tailTruncation" baselineAdjustment="alignBaselines" adjustsFontSizeToFit="NO" id="yak-dZ-uPc">
+                                                    <rect key="frame" x="270.5" y="12" width="69.5" height="20.5"/>
+                                                    <autoresizingMask key="autoresizingMask"/>
+                                                    <fontDescription key="fontDescription" type="system" pointSize="17"/>
+                                                    <color key="textColor" white="0.5" alpha="1" colorSpace="custom" customColorSpace="genericGamma22GrayColorSpace"/>
+                                                    <nil key="highlightedColor"/>
+                                                </label>
+                                            </subviews>
+                                        </tableViewCellContentView>
+                                    </tableViewCell>
+                                    <tableViewCell clipsSubviews="YES" contentMode="scaleToFill" selectionStyle="gray" accessoryType="disclosureIndicator" indentationWidth="10" reuseIdentifier="Cell" textLabel="h6M-Uh-TBA" detailTextLabel="ERw-hy-cF5" style="IBUITableViewCellStyleValue1" id="zQu-CI-OZo">
+                                        <rect key="frame" x="0.0" y="99.5" width="375" height="44"/>
+                                        <autoresizingMask key="autoresizingMask"/>
+                                        <tableViewCellContentView key="contentView" opaque="NO" clipsSubviews="YES" multipleTouchEnabled="YES" contentMode="center" tableViewCell="zQu-CI-OZo" id="iOw-oN-hbu">
+                                            <rect key="frame" x="0.0" y="0.0" width="348" height="44"/>
+                                            <autoresizingMask key="autoresizingMask"/>
+                                            <subviews>
+                                                <label opaque="NO" multipleTouchEnabled="YES" contentMode="left" text="Developer" textAlignment="natural" lineBreakMode="tailTruncation" baselineAdjustment="alignBaselines" adjustsFontSizeToFit="NO" id="h6M-Uh-TBA">
+                                                    <rect key="frame" x="16" y="12" width="78" height="20.5"/>
+                                                    <autoresizingMask key="autoresizingMask"/>
+                                                    <fontDescription key="fontDescription" type="system" pointSize="17"/>
+                                                    <color key="textColor" cocoaTouchSystemColor="darkTextColor"/>
+                                                    <nil key="highlightedColor"/>
+                                                </label>
+                                                <label opaque="NO" multipleTouchEnabled="YES" contentMode="left" insetsLayoutMarginsFromSafeArea="NO" text="Arisotura" textAlignment="right" lineBreakMode="tailTruncation" baselineAdjustment="alignBaselines" adjustsFontSizeToFit="NO" id="ERw-hy-cF5">
+                                                    <rect key="frame" x="270" y="12" width="70" height="20.5"/>
+                                                    <autoresizingMask key="autoresizingMask"/>
+                                                    <fontDescription key="fontDescription" type="system" pointSize="17"/>
+                                                    <color key="textColor" white="0.5" alpha="1" colorSpace="custom" customColorSpace="genericGamma22GrayColorSpace"/>
+                                                    <nil key="highlightedColor"/>
+                                                </label>
+                                            </subviews>
+                                        </tableViewCellContentView>
+                                    </tableViewCell>
+                                    <tableViewCell clipsSubviews="YES" contentMode="scaleToFill" selectionStyle="gray" accessoryType="disclosureIndicator" indentationWidth="10" reuseIdentifier="Cell" textLabel="Uvd-Lt-Ckx" detailTextLabel="kHA-YX-Ah9" style="IBUITableViewCellStyleValue1" id="DkF-3y-vuz">
+                                        <rect key="frame" x="0.0" y="143.5" width="375" height="44"/>
+                                        <autoresizingMask key="autoresizingMask"/>
+                                        <tableViewCellContentView key="contentView" opaque="NO" clipsSubviews="YES" multipleTouchEnabled="YES" contentMode="center" tableViewCell="DkF-3y-vuz" id="eKc-NV-XhA">
+                                            <rect key="frame" x="0.0" y="0.0" width="348" height="44"/>
+                                            <autoresizingMask key="autoresizingMask"/>
+                                            <subviews>
+                                                <label opaque="NO" multipleTouchEnabled="YES" contentMode="left" text="Source" textAlignment="natural" lineBreakMode="tailTruncation" baselineAdjustment="alignBaselines" adjustsFontSizeToFit="NO" id="Uvd-Lt-Ckx">
+                                                    <rect key="frame" x="16" y="12" width="54" height="20.5"/>
+                                                    <autoresizingMask key="autoresizingMask"/>
+                                                    <fontDescription key="fontDescription" type="system" pointSize="17"/>
+                                                    <color key="textColor" cocoaTouchSystemColor="darkTextColor"/>
+                                                    <nil key="highlightedColor"/>
+                                                </label>
+                                                <label opaque="NO" multipleTouchEnabled="YES" contentMode="left" insetsLayoutMarginsFromSafeArea="NO" text="GitHub" textAlignment="right" lineBreakMode="tailTruncation" baselineAdjustment="alignBaselines" adjustsFontSizeToFit="NO" id="kHA-YX-Ah9">
+                                                    <rect key="frame" x="286" y="12" width="54" height="20.5"/>
+                                                    <autoresizingMask key="autoresizingMask"/>
+                                                    <fontDescription key="fontDescription" type="system" pointSize="17"/>
+                                                    <color key="textColor" white="0.5" alpha="1" colorSpace="custom" customColorSpace="genericGamma22GrayColorSpace"/>
+                                                    <nil key="highlightedColor"/>
+                                                </label>
+                                            </subviews>
+                                        </tableViewCellContentView>
+                                    </tableViewCell>
+                                    <tableViewCell clipsSubviews="YES" contentMode="scaleToFill" selectionStyle="gray" accessoryType="disclosureIndicator" indentationWidth="10" reuseIdentifier="Cell" textLabel="6JV-NA-R4y" detailTextLabel="TXn-bD-NB8" style="IBUITableViewCellStyleValue1" id="IOM-Yq-92K">
+                                        <rect key="frame" x="0.0" y="187.5" width="375" height="44"/>
+                                        <autoresizingMask key="autoresizingMask"/>
+                                        <tableViewCellContentView key="contentView" opaque="NO" clipsSubviews="YES" multipleTouchEnabled="YES" contentMode="center" tableViewCell="IOM-Yq-92K" id="yt9-X5-w9G">
+                                            <rect key="frame" x="0.0" y="0.0" width="348" height="44"/>
+                                            <autoresizingMask key="autoresizingMask"/>
+                                            <subviews>
+                                                <label opaque="NO" multipleTouchEnabled="YES" contentMode="left" text="Donate" textAlignment="natural" lineBreakMode="tailTruncation" baselineAdjustment="alignBaselines" adjustsFontSizeToFit="NO" id="6JV-NA-R4y">
+                                                    <rect key="frame" x="16" y="12" width="55.5" height="20.5"/>
+                                                    <autoresizingMask key="autoresizingMask"/>
+                                                    <fontDescription key="fontDescription" type="system" pointSize="17"/>
+                                                    <color key="textColor" cocoaTouchSystemColor="darkTextColor"/>
+                                                    <nil key="highlightedColor"/>
+                                                </label>
+                                                <label opaque="NO" multipleTouchEnabled="YES" contentMode="left" insetsLayoutMarginsFromSafeArea="NO" text="Patreon" textAlignment="right" lineBreakMode="tailTruncation" baselineAdjustment="alignBaselines" adjustsFontSizeToFit="NO" id="TXn-bD-NB8">
+                                                    <rect key="frame" x="280.5" y="12" width="59.5" height="20.5"/>
+                                                    <autoresizingMask key="autoresizingMask"/>
+                                                    <fontDescription key="fontDescription" type="system" pointSize="17"/>
+                                                    <color key="textColor" white="0.5" alpha="1" colorSpace="custom" customColorSpace="genericGamma22GrayColorSpace"/>
+                                                    <nil key="highlightedColor"/>
+                                                </label>
+                                            </subviews>
+                                        </tableViewCellContentView>
+                                    </tableViewCell>
+                                </cells>
+                            </tableViewSection>
+                            <tableViewSection headerTitle="BIOS Files" footerTitle="Delta requires these BIOS files in order to play Nintendo DS games. Tap one to import it from Files." id="ObZ-cl-5sV">
+                                <cells>
+                                    <tableViewCell clipsSubviews="YES" contentMode="scaleToFill" selectionStyle="gray" accessoryType="disclosureIndicator" indentationWidth="10" reuseIdentifier="Cell" textLabel="Bfp-iA-wWE" detailTextLabel="Xpe-sd-GRy" style="IBUITableViewCellStyleValue1" id="ian-1X-SOi">
+                                        <rect key="frame" x="0.0" y="299" width="375" height="44"/>
+                                        <autoresizingMask key="autoresizingMask"/>
+                                        <tableViewCellContentView key="contentView" opaque="NO" clipsSubviews="YES" multipleTouchEnabled="YES" contentMode="center" tableViewCell="ian-1X-SOi" id="nE9-5Y-G2k">
+                                            <rect key="frame" x="0.0" y="0.0" width="348" height="44"/>
+                                            <autoresizingMask key="autoresizingMask"/>
+                                            <subviews>
+                                                <label opaque="NO" multipleTouchEnabled="YES" contentMode="left" text="bios7.bin" textAlignment="natural" lineBreakMode="tailTruncation" baselineAdjustment="alignBaselines" adjustsFontSizeToFit="NO" id="Bfp-iA-wWE">
+                                                    <rect key="frame" x="16" y="12" width="67" height="20.5"/>
+                                                    <autoresizingMask key="autoresizingMask"/>
+                                                    <fontDescription key="fontDescription" type="system" pointSize="17"/>
+                                                    <color key="textColor" cocoaTouchSystemColor="darkTextColor"/>
+                                                    <nil key="highlightedColor"/>
+                                                </label>
+                                                <label opaque="NO" multipleTouchEnabled="YES" contentMode="left" insetsLayoutMarginsFromSafeArea="NO" text="Required" textAlignment="right" lineBreakMode="tailTruncation" baselineAdjustment="alignBaselines" adjustsFontSizeToFit="NO" id="Xpe-sd-GRy">
+                                                    <rect key="frame" x="271.5" y="12" width="68.5" height="20.5"/>
+                                                    <autoresizingMask key="autoresizingMask"/>
+                                                    <fontDescription key="fontDescription" type="system" pointSize="17"/>
+                                                    <color key="textColor" systemColor="systemRedColor" red="1" green="0.23137254900000001" blue="0.18823529410000001" alpha="1" colorSpace="custom" customColorSpace="sRGB"/>
+                                                    <nil key="highlightedColor"/>
+                                                </label>
+                                            </subviews>
+                                        </tableViewCellContentView>
+                                    </tableViewCell>
+                                    <tableViewCell clipsSubviews="YES" contentMode="scaleToFill" selectionStyle="gray" accessoryType="disclosureIndicator" indentationWidth="10" reuseIdentifier="Cell" textLabel="fgD-y0-55T" detailTextLabel="b8s-cx-IgW" style="IBUITableViewCellStyleValue1" id="dwT-0T-gFD">
+                                        <rect key="frame" x="0.0" y="343" width="375" height="44"/>
+                                        <autoresizingMask key="autoresizingMask"/>
+                                        <tableViewCellContentView key="contentView" opaque="NO" clipsSubviews="YES" multipleTouchEnabled="YES" contentMode="center" tableViewCell="dwT-0T-gFD" id="KEg-18-WYZ">
+                                            <rect key="frame" x="0.0" y="0.0" width="348" height="44"/>
+                                            <autoresizingMask key="autoresizingMask"/>
+                                            <subviews>
+                                                <label opaque="NO" multipleTouchEnabled="YES" contentMode="left" text="bios9.bin" textAlignment="natural" lineBreakMode="tailTruncation" baselineAdjustment="alignBaselines" adjustsFontSizeToFit="NO" id="fgD-y0-55T">
+                                                    <rect key="frame" x="16" y="12" width="70" height="20.5"/>
+                                                    <autoresizingMask key="autoresizingMask"/>
+                                                    <fontDescription key="fontDescription" type="system" pointSize="17"/>
+                                                    <color key="textColor" cocoaTouchSystemColor="darkTextColor"/>
+                                                    <nil key="highlightedColor"/>
+                                                </label>
+                                                <label opaque="NO" multipleTouchEnabled="YES" contentMode="left" insetsLayoutMarginsFromSafeArea="NO" text="Required" textAlignment="right" lineBreakMode="tailTruncation" baselineAdjustment="alignBaselines" adjustsFontSizeToFit="NO" id="b8s-cx-IgW">
+                                                    <rect key="frame" x="271.5" y="12" width="68.5" height="20.5"/>
+                                                    <autoresizingMask key="autoresizingMask"/>
+                                                    <fontDescription key="fontDescription" type="system" pointSize="17"/>
+                                                    <color key="textColor" systemColor="systemRedColor" red="1" green="0.23137254900000001" blue="0.18823529410000001" alpha="1" colorSpace="custom" customColorSpace="sRGB"/>
+                                                    <nil key="highlightedColor"/>
+                                                </label>
+                                            </subviews>
+                                        </tableViewCellContentView>
+                                    </tableViewCell>
+                                    <tableViewCell clipsSubviews="YES" contentMode="scaleToFill" selectionStyle="gray" accessoryType="disclosureIndicator" indentationWidth="10" reuseIdentifier="Cell" textLabel="SIu-zD-qfE" detailTextLabel="CW8-h0-YST" style="IBUITableViewCellStyleValue1" id="Tll-tX-97T">
+                                        <rect key="frame" x="0.0" y="387" width="375" height="44"/>
+                                        <autoresizingMask key="autoresizingMask"/>
+                                        <tableViewCellContentView key="contentView" opaque="NO" clipsSubviews="YES" multipleTouchEnabled="YES" contentMode="center" tableViewCell="Tll-tX-97T" id="4ca-AM-jBE">
+                                            <rect key="frame" x="0.0" y="0.0" width="348" height="44"/>
+                                            <autoresizingMask key="autoresizingMask"/>
+                                            <subviews>
+                                                <label opaque="NO" multipleTouchEnabled="YES" contentMode="left" text="firmware.bin" textAlignment="natural" lineBreakMode="tailTruncation" baselineAdjustment="alignBaselines" adjustsFontSizeToFit="NO" id="SIu-zD-qfE">
+                                                    <rect key="frame" x="16" y="12" width="94.5" height="20.5"/>
+                                                    <autoresizingMask key="autoresizingMask"/>
+                                                    <fontDescription key="fontDescription" type="system" pointSize="17"/>
+                                                    <color key="textColor" cocoaTouchSystemColor="darkTextColor"/>
+                                                    <nil key="highlightedColor"/>
+                                                </label>
+                                                <label opaque="NO" multipleTouchEnabled="YES" contentMode="left" insetsLayoutMarginsFromSafeArea="NO" text="Required" textAlignment="right" lineBreakMode="tailTruncation" baselineAdjustment="alignBaselines" adjustsFontSizeToFit="NO" id="CW8-h0-YST">
+                                                    <rect key="frame" x="271.5" y="12" width="68.5" height="20.5"/>
+                                                    <autoresizingMask key="autoresizingMask"/>
+                                                    <fontDescription key="fontDescription" type="system" pointSize="17"/>
+                                                    <color key="textColor" systemColor="systemRedColor" red="1" green="0.23137254900000001" blue="0.18823529410000001" alpha="1" colorSpace="custom" customColorSpace="sRGB"/>
+                                                    <nil key="highlightedColor"/>
+                                                </label>
+                                            </subviews>
+                                        </tableViewCellContentView>
+                                    </tableViewCell>
+                                </cells>
+                            </tableViewSection>
+                            <tableViewSection headerTitle="" footerTitle="Changing cores may improve performance at the cost of additional features." id="hbM-mL-bIr">
+                                <cells>
+                                    <tableViewCell clipsSubviews="YES" contentMode="scaleToFill" selectionStyle="gray" indentationWidth="10" reuseIdentifier="ChangeCell" textLabel="Jmx-Jw-278" style="IBUITableViewCellStyleDefault" id="p1T-4d-fC3">
+                                        <rect key="frame" x="0.0" y="506.5" width="375" height="44"/>
+                                        <autoresizingMask key="autoresizingMask"/>
+                                        <tableViewCellContentView key="contentView" opaque="NO" clipsSubviews="YES" multipleTouchEnabled="YES" contentMode="center" tableViewCell="p1T-4d-fC3" id="3bs-Bp-nd4">
+                                            <rect key="frame" x="0.0" y="0.0" width="375" height="44"/>
+                                            <autoresizingMask key="autoresizingMask"/>
+                                            <subviews>
+                                                <label opaque="NO" multipleTouchEnabled="YES" contentMode="left" text="Change Core" textAlignment="center" lineBreakMode="tailTruncation" baselineAdjustment="alignBaselines" adjustsFontSizeToFit="NO" id="Jmx-Jw-278">
+                                                    <rect key="frame" x="16" y="0.0" width="343" height="44"/>
+                                                    <autoresizingMask key="autoresizingMask"/>
+                                                    <fontDescription key="fontDescription" type="system" pointSize="17"/>
+                                                    <color key="textColor" systemColor="systemRedColor" red="1" green="0.23137254900000001" blue="0.18823529410000001" alpha="1" colorSpace="custom" customColorSpace="sRGB"/>
+                                                    <nil key="highlightedColor"/>
+                                                </label>
+                                            </subviews>
+                                        </tableViewCellContentView>
+                                    </tableViewCell>
+                                </cells>
+                            </tableViewSection>
+                        </sections>
+                        <connections>
+                            <outlet property="dataSource" destination="OwL-4c-EEA" id="b1y-6m-QaJ"/>
+                            <outlet property="delegate" destination="OwL-4c-EEA" id="0J0-nD-H0y"/>
+                        </connections>
+                    </tableView>
+                    <navigationItem key="navigationItem" title="Nintendo DS" id="7dF-4c-IZh">
+                        <barButtonItem key="rightBarButtonItem" style="done" systemItem="done" id="5LJ-CC-74Q">
+                            <connections>
+                                <segue destination="fCP-Vh-l72" kind="unwind" unwindAction="unwindToGameCollectionViewController:" id="o4i-NP-axs"/>
+                            </connections>
+                        </barButtonItem>
+                    </navigationItem>
+                </tableViewController>
+                <placeholder placeholderIdentifier="IBFirstResponder" id="Sor-YZ-h3B" userLabel="First Responder" sceneMemberID="firstResponder"/>
+                <exit id="fCP-Vh-l72" userLabel="Exit" sceneMemberID="exit"/>
+            </objects>
+            <point key="canvasLocation" x="2513" y="2680"/>
         </scene>
     </scenes>
     <resources>
diff --git a/Delta/Emulation/GameViewController.swift b/Delta/Emulation/GameViewController.swift
index f452190..d1db7cb 100644
--- a/Delta/Emulation/GameViewController.swift
+++ b/Delta/Emulation/GameViewController.swift
@@ -11,6 +11,8 @@ import UIKit
 import DeltaCore
 import GBADeltaCore
 
+import struct DSDeltaCore.DS
+
 import Roxas
 
 private var kvoContext = 0
@@ -309,6 +311,19 @@ extension GameViewController
         self.updateControllers()
     }
     
+    override func viewDidAppear(_ animated: Bool)
+    {
+        super.viewDidAppear(animated)
+        
+        if self.emulatorCore?.deltaCore == DS.core, UserDefaults.standard.desmumeDeprecatedAlertCount < 3
+        {
+            let toastView = RSTToastView(text: NSLocalizedString("DeSmuME Core Deprecated", comment: ""), detailText: NSLocalizedString("Switch to the melonDS core in Settings for latest improvements.", comment: ""))
+            self.show(toastView, duration: 5.0)
+            
+            UserDefaults.standard.desmumeDeprecatedAlertCount += 1
+        }
+    }
+    
     override func viewWillTransition(to size: CGSize, with coordinator: UIViewControllerTransitionCoordinator)
     {
         super.viewWillTransition(to: size, with: coordinator)
@@ -1023,6 +1038,16 @@ extension GameViewController: GameViewControllerDelegate
     }
 }
 
+private extension GameViewController
+{
+    func show(_ toastView: RSTToastView, duration: TimeInterval = 3.0)
+    {
+        toastView.textLabel.textAlignment = .center
+        toastView.presentationEdge = .top
+        toastView.show(in: self.view, duration: duration)
+    }
+}
+
 //MARK: - Notifications -
 private extension GameViewController
 {
@@ -1121,16 +1146,7 @@ private extension GameViewController
         func presentToastView()
         {
             let toastView = RSTToastView(text: NSLocalizedString("Autorotation Disabled", comment: ""), detailText: NSLocalizedString("Pause game to change orientation.", comment: ""))
-            toastView.textLabel.textAlignment = .center
-            toastView.presentationEdge = .bottom
-            
-            if let traits = self.controllerView.controllerSkinTraits, traits.orientation == .landscape, self.controllerView?.controllerSkin?.gameScreenFrame(for: traits) == nil
-            {
-                // Only change landscape vertical offset if there is no custom game screen frame for the current controller skin.
-                toastView.edgeOffset.vertical = 30
-            }
-            
-            toastView.show(in: self.gameView, duration: 3.0)
+            self.show(toastView)
         }
         
         DispatchQueue.main.async {
@@ -1172,4 +1188,8 @@ private extension GameViewController
         }
     }
 }
+
+private extension UserDefaults
+{
+    @NSManaged var desmumeDeprecatedAlertCount: Int
 }
diff --git a/Delta/Extensions/DeltaCoreProtocol+Delta.swift b/Delta/Extensions/DeltaCoreProtocol+Delta.swift
deleted file mode 100644
index 662f511..0000000
--- a/Delta/Extensions/DeltaCoreProtocol+Delta.swift
+++ /dev/null
@@ -1,26 +0,0 @@
-//
-//  DeltaCoreProtocol+Delta.swift
-//  Delta
-//
-//  Created by Riley Testut on 4/30/17.
-//  Copyright © 2017 Riley Testut. All rights reserved.
-//
-
-import DeltaCore
-
-extension DeltaCoreProtocol
-{
-    var supportedRates: ClosedRange<Double> {
-        guard let system = System(gameType: self.gameType) else { return 1...1 }
-        
-        switch system
-        {
-        case .nes: return 1...4
-        case .snes: return 1...4
-        case .gbc: return 1...4
-        case .gba: return 1...3
-        case .n64: return 1...3
-        case .ds: return 1...1
-        }
-    }
-}
diff --git a/Delta/Game Selection/GameCollectionViewController.swift b/Delta/Game Selection/GameCollectionViewController.swift
index eb2dc9e..31ffe34 100644
--- a/Delta/Game Selection/GameCollectionViewController.swift	
+++ b/Delta/Game Selection/GameCollectionViewController.swift	
@@ -11,6 +11,7 @@ import MobileCoreServices
 import AVFoundation
 
 import DeltaCore
+import MelonDSDeltaCore
 
 import Roxas
 import Harmony
@@ -23,6 +24,7 @@ extension GameCollectionViewController
     {
         case alreadyRunning
         case downloadingGameSave
+        case biosNotFound
     }
 }
 
@@ -328,6 +330,16 @@ private extension GameCollectionViewController
                 alertController.addAction(.ok)
                 self.present(alertController, animated: true, completion: nil)
             }
+            catch LaunchError.biosNotFound
+            {
+                let alertController = UIAlertController(title: NSLocalizedString("Missing Required DS Files", comment: ""), message: NSLocalizedString("Delta requires certain files to play Nintendo DS games. Please import them to launch this game.", comment: ""), preferredStyle: .alert)
+                alertController.addAction(UIAlertAction(title: NSLocalizedString("Import Files", comment: ""), style: .default) { _ in
+                    self.performSegue(withIdentifier: "showDSSettings", sender: nil)
+                })
+                alertController.addAction(.cancel)
+                
+                self.present(alertController, animated: true, completion: nil)
+            }
             catch
             {
                 let alertController = UIAlertController(title: NSLocalizedString("Unable to Launch Game", comment: ""), error: error)
@@ -378,6 +390,15 @@ private extension GameCollectionViewController
                 }
             }
         }
+        
+        if game.type == .ds && Settings.preferredCore(for: .ds) == MelonDS.core
+        {
+            guard
+                FileManager.default.fileExists(atPath: MelonDSEmulatorBridge.shared.bios7URL.path) &&
+                FileManager.default.fileExists(atPath: MelonDSEmulatorBridge.shared.bios9URL.path) &&
+                FileManager.default.fileExists(atPath: MelonDSEmulatorBridge.shared.firmwareURL.path)
+            else { throw LaunchError.biosNotFound }
+        }
     }
 }
 
diff --git a/Delta/Game Selection/GamesViewController.swift b/Delta/Game Selection/GamesViewController.swift
index 4a84687..ee7cd8b 100644
--- a/Delta/Game Selection/GamesViewController.swift	
+++ b/Delta/Game Selection/GamesViewController.swift	
@@ -75,6 +75,7 @@ class GamesViewController: UIViewController
         
         NotificationCenter.default.addObserver(self, selector: #selector(GamesViewController.syncingDidStart(_:)), name: SyncCoordinator.didStartSyncingNotification, object: nil)
         NotificationCenter.default.addObserver(self, selector: #selector(GamesViewController.syncingDidFinish(_:)), name: SyncCoordinator.didFinishSyncingNotification, object: nil)
+        NotificationCenter.default.addObserver(self, selector: #selector(GamesViewController.settingsDidChange(_:)), name: .settingsDidChange, object: nil)
         NotificationCenter.default.addObserver(self, selector: #selector(GamesViewController.emulationDidQuit(_:)), name: EmulatorCore.emulationDidQuitNotification, object: nil)
     }
 }
@@ -529,6 +530,22 @@ private extension GamesViewController
     {
         self.quitEmulation()
     }
+    
+    @objc func settingsDidChange(_ notification: Notification)
+    {
+        guard let emulatorCore = self.activeEmulatorCore else { return }
+        guard let game = emulatorCore.game as? Game else { return }
+        
+        game.managedObjectContext?.performAndWait {
+            guard
+                let name = notification.userInfo?[Settings.NotificationUserInfoKey.name] as? String, name == Settings.preferredCoreSettingsKey(for: emulatorCore.game.type),
+                let core = notification.userInfo?[Settings.NotificationUserInfoKey.core] as? DeltaCoreProtocol, core != emulatorCore.deltaCore
+            else { return }
+            
+            emulatorCore.stop()
+            self.quitEmulation()
+        }
+    }
 }
 
 //MARK: - UIPageViewController -
diff --git a/Delta/Settings/Cores/MelonDSCoreSettingsViewController.swift b/Delta/Settings/Cores/MelonDSCoreSettingsViewController.swift
new file mode 100644
index 0000000..8b742af
--- /dev/null
+++ b/Delta/Settings/Cores/MelonDSCoreSettingsViewController.swift
@@ -0,0 +1,362 @@
+//
+//  MelonDSCoreSettingsViewController.swift
+//  Delta
+//
+//  Created by Riley Testut on 4/13/20.
+//  Copyright © 2020 Riley Testut. All rights reserved.
+//
+
+import UIKit
+import SafariServices
+import MobileCoreServices
+
+import DeltaCore
+import MelonDSDeltaCore
+
+import struct DSDeltaCore.DS
+
+import Roxas
+
+private extension MelonDSCoreSettingsViewController
+{
+    enum Section: Int
+    {
+        case general
+        case bios
+        case changeCore
+    }
+    
+    enum BIOS: Int
+    {
+        case bios7
+        case bios9
+        case firmware
+        
+        var fileURL: URL {
+            switch self
+            {
+            case .bios7: return MelonDSEmulatorBridge.shared.bios7URL
+            case .bios9: return MelonDSEmulatorBridge.shared.bios9URL
+            case .firmware: return MelonDSEmulatorBridge.shared.firmwareURL
+            }
+        }
+    }
+}
+
+class MelonDSCoreSettingsViewController: UITableViewController
+{
+    private var importDestinationURL: URL?
+    
+    override func viewDidLoad()
+    {
+        super.viewDidLoad()
+        
+        if let navigationController = self.navigationController, navigationController.viewControllers.first != self
+        {
+            self.navigationItem.rightBarButtonItem = nil
+        }
+        
+        NotificationCenter.default.addObserver(self, selector: #selector(MelonDSCoreSettingsViewController.willEnterForeground(_:)), name: UIApplication.willEnterForegroundNotification, object: nil)
+    }
+    
+    override func viewWillAppear(_ animated: Bool)
+    {
+        super.viewWillAppear(animated)
+        
+        self.tableView.reloadData()
+    }
+    
+    override func viewDidDisappear(_ animated: Bool)
+    {
+        super.viewDidDisappear(animated)
+        
+        if let core = Delta.registeredCores[.ds]
+        {
+            DatabaseManager.shared.performBackgroundTask { (context) in
+                // Prepare database in case we changed/updated cores.
+                DatabaseManager.shared.prepare(core, in: context)
+                context.saveWithErrorLogging()
+            }
+        }
+    }
+}
+
+private extension MelonDSCoreSettingsViewController
+{
+    func openMetadataURL(for key: DeltaCoreMetadata.Key)
+    {
+        guard let metadata = Settings.preferredCore(for: .ds)?.metadata else { return }
+        
+        let item = metadata[key]
+        guard let url = item?.url else {
+            if let indexPath = self.tableView.indexPathForSelectedRow
+            {
+                self.tableView.deselectRow(at: indexPath, animated: true)
+            }
+            
+            return
+        }
+        
+        let safariViewController = SFSafariViewController(url: url)
+        safariViewController.preferredControlTintColor = .deltaPurple
+        self.present(safariViewController, animated: true, completion: nil)
+    }
+    
+    func locate(_ bios: BIOS)
+    {
+        self.importDestinationURL = bios.fileURL
+        
+        var supportedTypes = [kUTTypeItem as String, kUTTypeContent as String, "com.apple.macbinary-archive" /* System UTI for .bin */]
+        
+        // Explicitly support files with .bin and .rom extensions.
+        if let binTypes = UTTypeCreateAllIdentifiersForTag(kUTTagClassFilenameExtension, "bin" as CFString, nil)?.takeRetainedValue()
+        {
+            let types = (binTypes as NSArray).map { $0 as! String }
+            supportedTypes.append(contentsOf: types)
+        }
+            
+        if let romTypes = UTTypeCreateAllIdentifiersForTag(kUTTagClassFilenameExtension, "rom" as CFString, nil)?.takeRetainedValue()
+        {
+            let types = (romTypes as NSArray).map { $0 as! String }
+            supportedTypes.append(contentsOf: types)
+        }
+        
+        let documentPicker = UIDocumentPickerViewController(documentTypes: supportedTypes, in: .import)
+        documentPicker.delegate = self
+        
+        if #available(iOS 13.0, *)
+        {
+            documentPicker.overrideUserInterfaceStyle = .dark
+        }
+        
+        self.present(documentPicker, animated: true, completion: nil)
+    }
+    
+    func changeCore()
+    {
+        let alertController = UIAlertController(title: NSLocalizedString("Change Emulator Core", comment: ""), message: NSLocalizedString("Save states are not compatible between different emulator cores. Make sure to use in-game saves in order to keep using your save data.\n\nYour existing save states will not be deleted and will be available whenever you switch cores again.", comment: ""), preferredStyle: .actionSheet)
+        
+        var desmumeActionTitle = DS.core.metadata?.name.value ?? DS.core.name
+        var melonDSActionTitle = MelonDS.core.metadata?.name.value ?? MelonDS.core.name
+        
+        if Settings.preferredCore(for: .ds) == DS.core
+        {
+            desmumeActionTitle += " ✓"
+        }
+        else
+        {
+            melonDSActionTitle += " ✓"
+        }
+        
+        alertController.addAction(UIAlertAction(title: desmumeActionTitle, style: .default, handler: { (action) in
+            Settings.setPreferredCore(DS.core, for: .ds)
+            self.tableView.reloadData()
+        }))
+        
+        alertController.addAction(UIAlertAction(title: melonDSActionTitle, style: .default, handler: { (action) in
+            Settings.setPreferredCore(MelonDS.core, for: .ds)
+            self.tableView.reloadData()
+        }))
+        alertController.addAction(.cancel)
+        self.present(alertController, animated: true, completion: nil)
+        
+        if let indexPath = self.tableView.indexPathForSelectedRow
+        {
+            self.tableView.deselectRow(at: indexPath, animated: true)
+        }
+    }
+    
+    @objc func willEnterForeground(_ notification: Notification)
+    {
+        self.tableView.reloadData()
+    }
+}
+
+extension MelonDSCoreSettingsViewController
+{
+    override func tableView(_ tableView: UITableView, cellForRowAt indexPath: IndexPath) -> UITableViewCell
+    {
+        let cell = super.tableView(tableView, cellForRowAt: indexPath)
+        
+        switch Section(rawValue: indexPath.section)!
+        {
+        case .general:
+            let key = DeltaCoreMetadata.Key.allCases[indexPath.row]
+            let item = Settings.preferredCore(for: .ds)?.metadata?[key]
+            
+            cell.detailTextLabel?.text = item?.value ?? NSLocalizedString("-", comment: "")
+            cell.detailTextLabel?.textColor = .gray
+            
+            if item?.url != nil
+            {
+                cell.accessoryType = .disclosureIndicator
+                cell.selectionStyle = .default
+            }
+            else
+            {
+                cell.accessoryType = .none
+                cell.selectionStyle = .none
+            }
+            
+            cell.contentView.isHidden = (item == nil)
+            
+        case .bios:
+            let bios = BIOS(rawValue: indexPath.row)!
+            
+            if FileManager.default.fileExists(atPath: bios.fileURL.path)
+            {
+                cell.accessoryType = .checkmark
+                cell.detailTextLabel?.text = nil
+                cell.detailTextLabel?.textColor = .gray
+            }
+            else
+            {
+                cell.accessoryType = .disclosureIndicator
+                cell.detailTextLabel?.text = NSLocalizedString("Required", comment: "")
+                cell.detailTextLabel?.textColor = .red
+            }
+            
+            cell.selectionStyle = .default
+            
+        case .changeCore: break
+        }
+        
+        return cell
+    }
+    
+    override func tableView(_ tableView: UITableView, willDisplay cell: UITableViewCell, forRowAt indexPath: IndexPath)
+    {
+        guard let core = Settings.preferredCore(for: .ds) else { return }
+        
+        let key = DeltaCoreMetadata.Key.allCases[indexPath.row]
+        let lastKey = DeltaCoreMetadata.Key.allCases.reversed().first { core.metadata?[$0] != nil }
+        
+        if key == lastKey
+        {
+            // Hide separator for last visible row in case we've hidden additional rows.
+            cell.separatorInset.left = 0
+        }
+        else
+        {
+            cell.separatorInset.left = self.view.layoutMargins.left
+        }
+    }
+    
+    override func tableView(_ tableView: UITableView, didSelectRowAt indexPath: IndexPath)
+    {
+        switch Section(rawValue: indexPath.section)!
+        {
+        case .general:
+            let key = DeltaCoreMetadata.Key.allCases[indexPath.row]
+            self.openMetadataURL(for: key)
+            
+        case .bios:
+            let bios = BIOS(rawValue: indexPath.row)!
+            self.locate(bios)
+            
+        case .changeCore:
+            self.changeCore()
+        }
+    }
+    
+    override func tableView(_ tableView: UITableView, titleForHeaderInSection section: Int) -> String?
+    {
+        switch Section(rawValue: section)!
+        {
+        case .bios:
+            guard Settings.preferredCore(for: .ds) == MelonDS.core else { return nil }
+            
+        default: break
+        }
+        
+        return super.tableView(tableView, titleForHeaderInSection: section)
+    }
+    
+    override func tableView(_ tableView: UITableView, titleForFooterInSection section: Int) -> String?
+    {
+        switch Section(rawValue: section)!
+        {
+        case .bios:
+            guard Settings.preferredCore(for: .ds) == MelonDS.core else { return nil }
+            
+        default: break
+        }
+        
+        return super.tableView(tableView, titleForFooterInSection: section)
+    }
+    
+    override func tableView(_ tableView: UITableView, heightForRowAt indexPath: IndexPath) -> CGFloat
+    {
+        switch Section(rawValue: indexPath.section)!
+        {
+        case .general:
+            let key = DeltaCoreMetadata.Key.allCases[indexPath.row]
+            guard Settings.preferredCore(for: .ds)?.metadata?[key] != nil else { return  0 }
+            
+        case .bios:
+            guard Settings.preferredCore(for: .ds) == MelonDS.core else { return 0 }
+            
+        default: break
+        }
+        
+        return super.tableView(tableView, heightForRowAt: indexPath)
+    }
+    
+    override func tableView(_ tableView: UITableView, heightForHeaderInSection section: Int) -> CGFloat
+    {
+        switch Section(rawValue: section)!
+        {
+        case .bios:
+            guard Settings.preferredCore(for: .ds) == MelonDS.core else { return 1 }
+            
+        default: break
+        }
+        
+        return super.tableView(tableView, heightForHeaderInSection: section)
+    }
+    
+    override func tableView(_ tableView: UITableView, heightForFooterInSection section: Int) -> CGFloat
+    {
+        switch Section(rawValue: section)!
+        {
+        case .bios:
+            guard Settings.preferredCore(for: .ds) == MelonDS.core else { return 1 }
+            
+        default: break
+        }
+        
+        return super.tableView(tableView, heightForFooterInSection: section)
+    }
+}
+
+extension MelonDSCoreSettingsViewController: UIDocumentPickerDelegate
+{
+    func documentPickerWasCancelled(_ controller: UIDocumentPickerViewController)
+    {
+        self.importDestinationURL = nil
+        self.tableView.reloadData() // Reloading index path causes cell to disappear...
+    }
+    
+    func documentPicker(_ controller: UIDocumentPickerViewController, didPickDocumentsAt urls: [URL])
+    {
+        defer {
+            self.importDestinationURL = nil
+            self.tableView.reloadData() // Reloading index path causes cell to disappear...
+        }
+        
+        guard let fileURL = urls.first, let destinationURL = self.importDestinationURL else { return }
+        
+        do
+        {
+            try FileManager.default.copyItem(at: fileURL, to: destinationURL, shouldReplace: true)
+        }
+        catch
+        {
+            let title = String(format: NSLocalizedString("Could not import %@.", comment: ""), fileURL.lastPathComponent)
+
+            let alertController = UIAlertController(title: title, message: error.localizedDescription, preferredStyle: .alert)
+            alertController.addAction(.ok)
+            self.present(alertController, animated: true, completion: nil)
+        }
+    }
+}
diff --git a/Delta/Settings/Settings.swift b/Delta/Settings/Settings.swift
index d88e11b..7e462f7 100644
--- a/Delta/Settings/Settings.swift
+++ b/Delta/Settings/Settings.swift
@@ -10,6 +10,8 @@ import Foundation
 
 import DeltaCore
 
+import struct DSDeltaCore.DS
+
 import Roxas
 
 extension Notification.Name
@@ -25,6 +27,8 @@ extension Settings
         
         case system
         case traits
+        
+        case core
     }
     
     enum Name: String
@@ -55,7 +59,8 @@ struct Settings
                         #keyPath(UserDefaults.gameShortcutsMode): GameShortcutsMode.recent.rawValue,
                         #keyPath(UserDefaults.isButtonHapticFeedbackEnabled): true,
                         #keyPath(UserDefaults.isThumbstickHapticFeedbackEnabled): true,
-                        #keyPath(UserDefaults.sortSaveStatesByOldestFirst): true] as [String : Any]
+                        #keyPath(UserDefaults.sortSaveStatesByOldestFirst): true,
+                        Settings.preferredCoreSettingsKey(for: .ds): DS.core.identifier] as [String : Any]
         UserDefaults.standard.register(defaults: defaults)
     }
 }
@@ -177,6 +182,26 @@ extension Settings
         }
     }
     
+    static func preferredCore(for gameType: GameType) -> DeltaCoreProtocol?
+    {
+        let key = self.preferredCoreSettingsKey(for: gameType)
+        
+        let identifier = UserDefaults.standard.string(forKey: key)
+        
+        let core = System.allCores.first { $0.identifier == identifier }
+        return core
+    }
+    
+    static func setPreferredCore(_ core: DeltaCoreProtocol, for gameType: GameType)
+    {
+        Delta.register(core)
+        
+        let key = self.preferredCoreSettingsKey(for: gameType)
+        
+        UserDefaults.standard.set(core.identifier, forKey: key)
+        NotificationCenter.default.post(name: .settingsDidChange, object: nil, userInfo: [NotificationUserInfoKey.name: key, NotificationUserInfoKey.core: core])
+    }
+    
     static func preferredControllerSkin(for system: System, traits: DeltaCore.ControllerSkin.Traits) -> ControllerSkin?
     {
         guard let userDefaultsKey = self.preferredControllerSkinKey(for: system, traits: traits) else { return nil }
@@ -288,6 +313,15 @@ extension Settings
     }
 }
 
+extension Settings
+{
+    static func preferredCoreSettingsKey(for gameType: GameType) -> String
+    {
+        let key = "core." + gameType.rawValue
+        return key
+    }
+}
+
 private extension Settings
 {
     static func preferredControllerSkinKey(for system: System, traits: DeltaCore.ControllerSkin.Traits) -> String?
diff --git a/Delta/Settings/SettingsViewController.swift b/Delta/Settings/SettingsViewController.swift
index 1cf116e..090688a 100644
--- a/Delta/Settings/SettingsViewController.swift
+++ b/Delta/Settings/SettingsViewController.swift
@@ -23,6 +23,7 @@ private extension SettingsViewController
         case hapticFeedback
         case syncing
         case threeDTouch
+        case cores
         case patreon
         case credits
     }
@@ -31,6 +32,7 @@ private extension SettingsViewController
     {
         case controllers = "controllersSegue"
         case controllerSkins = "controllerSkinsSegue"
+        case dsSettings = "dsSettingsSegue"
     }
 
     enum SyncingRow: Int, CaseIterable
@@ -143,6 +145,8 @@ class SettingsViewController: UITableViewController
             
             let system = System.registeredSystems[indexPath.row]
             preferredControllerSkinsViewController.system = system
+            
+        case Segue.dsSettings: break
         }
     }
 }
@@ -341,6 +345,10 @@ extension SettingsViewController
             case .service: break
             }
             
+        case .cores:
+            let preferredCore = Settings.preferredCore(for: .ds)
+            cell.detailTextLabel?.text = preferredCore?.metadata?.name.value ?? preferredCore?.name ?? NSLocalizedString("Unknown", comment: "")
+            
         case .controllerOpacity, .hapticFeedback, .threeDTouch, .patreon, .credits: break
         }
 
@@ -356,6 +364,7 @@ extension SettingsViewController
         {
         case .controllers: self.performSegue(withIdentifier: Segue.controllers.rawValue, sender: cell)
         case .controllerSkins: self.performSegue(withIdentifier: Segue.controllerSkins.rawValue, sender: cell)
+        case .cores: self.performSegue(withIdentifier: Segue.dsSettings.rawValue, sender: cell)
         case .controllerOpacity, .hapticFeedback, .threeDTouch, .syncing: break
         case .patreon:
             let patreonURL = URL(string: "altstore://patreon")!
diff --git a/Delta/Systems/DeltaCoreProtocol+Delta.swift b/Delta/Systems/DeltaCoreProtocol+Delta.swift
new file mode 100644
index 0000000..bad62a5
--- /dev/null
+++ b/Delta/Systems/DeltaCoreProtocol+Delta.swift
@@ -0,0 +1,93 @@
+//
+//  DeltaCoreProtocol+Delta.swift
+//  Delta
+//
+//  Created by Riley Testut on 4/30/17.
+//  Copyright © 2017 Riley Testut. All rights reserved.
+//
+
+import DeltaCore
+
+import NESDeltaCore
+import SNESDeltaCore
+import GBCDeltaCore
+import GBADeltaCore
+import N64DeltaCore
+import MelonDSDeltaCore
+
+// Legacy Cores
+import struct DSDeltaCore.DS
+
+@dynamicMemberLookup
+struct DeltaCoreMetadata
+{
+    enum Key: CaseIterable
+    {
+        case name
+        case developer
+        case source
+        case donate
+    }
+    
+    struct Item
+    {
+        var value: String
+        var url: URL?
+    }
+    
+    var name: Item { self.items[.name]! }
+    private let items: [Key: Item]
+    
+    init?(_ items: [Key: Item])
+    {
+        guard items.keys.contains(.name) else { return nil }
+        self.items = items
+    }
+    
+    subscript(dynamicMember keyPath: KeyPath<Key.Type, Key>) -> Item?
+    {
+        let key = Key.self[keyPath: keyPath]
+        return self[key]
+    }
+    
+    subscript(_ key: Key) -> Item?
+    {
+        let item = self.items[key]
+        return item
+    }
+}
+
+extension DeltaCoreProtocol
+{
+    var supportedRates: ClosedRange<Double> {
+        switch self
+        {
+        case NES.core: return 1...4
+        case SNES.core: return 1...4
+        case GBC.core: return 1...4
+        case GBA.core: return 1...3
+        case N64.core: return 1...3
+        case DS.core: return 1...3
+        case MelonDS.core: return 1...2
+        default: return 1...2
+        }
+    }
+    
+    var metadata: DeltaCoreMetadata? {
+        switch self
+        {
+        case DS.core:
+            return DeltaCoreMetadata([.name: .init(value: NSLocalizedString("DeSmuME (Legacy)", comment: ""), url: URL(string: "http://desmume.org")),
+                                      .developer: .init(value: NSLocalizedString("DeSmuME team", comment: ""), url: URL(string: "https://wiki.desmume.org/index.php?title=DeSmuME:About")),
+                                      .source: .init(value: NSLocalizedString("GitHub", comment: ""), url: URL(string: "https://github.com/TASVideos/desmume"))])
+            
+        case MelonDS.core:
+            return DeltaCoreMetadata([.name: .init(value: NSLocalizedString("melonDS", comment: ""), url: URL(string: "http://melonds.kuribo64.net")),
+                                      .developer: .init(value: NSLocalizedString("Arisotura", comment: ""), url: URL(string: "https://twitter.com/Arisotura")),
+                                      .source: .init(value: NSLocalizedString("GitHub", comment: ""), url: URL(string: "https://github.com/Arisotura/melonDS")),
+                                      .donate: .init(value: NSLocalizedString("Patreon", comment: ""), url: URL(string: "https://www.patreon.com/staplebutter"))])
+            
+        default: return nil
+        }
+    }
+}
diff --git a/Delta/Systems/System.swift b/Delta/Systems/System.swift
index 8b9ab6f..2ece7db 100644
--- a/Delta/Systems/System.swift
+++ b/Delta/Systems/System.swift
@@ -15,6 +15,9 @@ import NESDeltaCore
 import N64DeltaCore
 import MelonDSDeltaCore
 
+// Legacy Cores
+import struct DSDeltaCore.DS
+
 enum System: CaseIterable
 {
     case nes
@@ -28,6 +31,10 @@ enum System: CaseIterable
         let systems = System.allCases.filter { Delta.registeredCores.keys.contains($0.gameType) }
         return systems
     }
+    
+    static var allCores: [DeltaCoreProtocol] {
+        return [NES.core, SNES.core, N64.core, GBC.core, GBA.core, DS.core, MelonDS.core]
+    }
 }
 
 extension System