diff --git a/source/funkin/data/freeplay/player/PlayerRegistry.hx b/source/funkin/data/freeplay/player/PlayerRegistry.hx
index 76b1c25c1..c14849bc4 100644
--- a/source/funkin/data/freeplay/player/PlayerRegistry.hx
+++ b/source/funkin/data/freeplay/player/PlayerRegistry.hx
@@ -5,6 +5,7 @@ import funkin.ui.freeplay.charselect.PlayableCharacter;
 import funkin.ui.freeplay.charselect.ScriptedPlayableCharacter;
 import funkin.save.Save;
 
+@:build(funkin.util.macro.RegistryMacro.build())
 class PlayerRegistry extends BaseRegistry<PlayableCharacter, PlayerData>
 {
   /**
@@ -16,15 +17,6 @@ class PlayerRegistry extends BaseRegistry<PlayableCharacter, PlayerData>
 
   public static final PLAYER_DATA_VERSION_RULE:thx.semver.VersionRule = "1.0.x";
 
-  public static var instance(get, never):PlayerRegistry;
-  static var _instance:Null<PlayerRegistry> = null;
-
-  static function get_instance():PlayerRegistry
-  {
-    if (_instance == null) _instance = new PlayerRegistry();
-    return _instance;
-  }
-
   /**
    * A mapping between stage character IDs and Freeplay playable character IDs.
    */
@@ -131,63 +123,6 @@ class PlayerRegistry extends BaseRegistry<PlayableCharacter, PlayerData>
     return ownedCharacterIds.exists(characterId);
   }
 
-  /**
-   * Read, parse, and validate the JSON data and produce the corresponding data object.
-   */
-  public function parseEntryData(id:String):Null<PlayerData>
-  {
-    // JsonParser does not take type parameters,
-    // otherwise this function would be in BaseRegistry.
-    var parser = new json2object.JsonParser<PlayerData>();
-    parser.ignoreUnknownVariables = false;
-
-    switch (loadEntryFile(id))
-    {
-      case {fileName: fileName, contents: contents}:
-        parser.fromJson(contents, fileName);
-      default:
-        return null;
-    }
-
-    if (parser.errors.length > 0)
-    {
-      printErrors(parser.errors, id);
-      return null;
-    }
-    return parser.value;
-  }
-
-  /**
-   * Parse and validate the JSON data and produce the corresponding data object.
-   *
-   * NOTE: Must be implemented on the implementation class.
-   * @param contents The JSON as a string.
-   * @param fileName An optional file name for error reporting.
-   */
-  public function parseEntryDataRaw(contents:String, ?fileName:String):Null<PlayerData>
-  {
-    var parser = new json2object.JsonParser<PlayerData>();
-    parser.ignoreUnknownVariables = false;
-    parser.fromJson(contents, fileName);
-
-    if (parser.errors.length > 0)
-    {
-      printErrors(parser.errors, fileName);
-      return null;
-    }
-    return parser.value;
-  }
-
-  function createScriptedEntry(clsName:String):PlayableCharacter
-  {
-    return ScriptedPlayableCharacter.init(clsName, "unknown");
-  }
-
-  function getScriptedClassNames():Array<String>
-  {
-    return ScriptedPlayableCharacter.listScriptClasses();
-  }
-
   /**
    * A list of all the playable characters from the base game, in order.
    */
diff --git a/source/funkin/data/notestyle/NoteStyleRegistry.hx b/source/funkin/data/notestyle/NoteStyleRegistry.hx
index 36d1b9200..43dbd41f7 100644
--- a/source/funkin/data/notestyle/NoteStyleRegistry.hx
+++ b/source/funkin/data/notestyle/NoteStyleRegistry.hx
@@ -4,6 +4,7 @@ import funkin.play.notes.notestyle.NoteStyle;
 import funkin.play.notes.notestyle.ScriptedNoteStyle;
 import funkin.data.notestyle.NoteStyleData;
 
+@:build(funkin.util.macro.RegistryMacro.build())
 class NoteStyleRegistry extends BaseRegistry<NoteStyle, NoteStyleData>
 {
   /**
@@ -15,15 +16,6 @@ class NoteStyleRegistry extends BaseRegistry<NoteStyle, NoteStyleData>
 
   public static final NOTE_STYLE_DATA_VERSION_RULE:thx.semver.VersionRule = "1.1.x";
 
-  public static var instance(get, never):NoteStyleRegistry;
-  static var _instance:Null<NoteStyleRegistry> = null;
-
-  static function get_instance():NoteStyleRegistry
-  {
-    if (_instance == null) _instance = new NoteStyleRegistry();
-    return _instance;
-  }
-
   public function new()
   {
     super('NOTESTYLE', 'notestyles', NOTE_STYLE_DATA_VERSION_RULE);
@@ -33,61 +25,4 @@ class NoteStyleRegistry extends BaseRegistry<NoteStyle, NoteStyleData>
   {
     return fetchEntry(Constants.DEFAULT_NOTE_STYLE);
   }
-
-  /**
-   * Read, parse, and validate the JSON data and produce the corresponding data object.
-   */
-  public function parseEntryData(id:String):Null<NoteStyleData>
-  {
-    // JsonParser does not take type parameters,
-    // otherwise this function would be in BaseRegistry.
-    var parser = new json2object.JsonParser<NoteStyleData>();
-    parser.ignoreUnknownVariables = false;
-
-    switch (loadEntryFile(id))
-    {
-      case {fileName: fileName, contents: contents}:
-        parser.fromJson(contents, fileName);
-      default:
-        return null;
-    }
-
-    if (parser.errors.length > 0)
-    {
-      printErrors(parser.errors, id);
-      return null;
-    }
-    return parser.value;
-  }
-
-  /**
-   * Parse and validate the JSON data and produce the corresponding data object.
-   *
-   * NOTE: Must be implemented on the implementation class.
-   * @param contents The JSON as a string.
-   * @param fileName An optional file name for error reporting.
-   */
-  public function parseEntryDataRaw(contents:String, ?fileName:String):Null<NoteStyleData>
-  {
-    var parser = new json2object.JsonParser<NoteStyleData>();
-    parser.ignoreUnknownVariables = false;
-    parser.fromJson(contents, fileName);
-
-    if (parser.errors.length > 0)
-    {
-      printErrors(parser.errors, fileName);
-      return null;
-    }
-    return parser.value;
-  }
-
-  function createScriptedEntry(clsName:String):NoteStyle
-  {
-    return ScriptedNoteStyle.init(clsName, "unknown");
-  }
-
-  function getScriptedClassNames():Array<String>
-  {
-    return ScriptedNoteStyle.listScriptClasses();
-  }
 }
diff --git a/source/funkin/data/song/SongRegistry.hx b/source/funkin/data/song/SongRegistry.hx
index e7cab246c..3e9f88453 100644
--- a/source/funkin/data/song/SongRegistry.hx
+++ b/source/funkin/data/song/SongRegistry.hx
@@ -13,6 +13,7 @@ import funkin.util.VersionUtil;
 using funkin.data.song.migrator.SongDataMigrator;
 
 @:nullSafety
+@:build(funkin.util.macro.RegistryMacro.build())
 class SongRegistry extends BaseRegistry<Song, SongMetadata>
 {
   /**
@@ -39,19 +40,6 @@ class SongRegistry extends BaseRegistry<Song, SongMetadata>
     return '${Constants.TITLE} - ${Constants.VERSION}';
   }
 
-  /**
-   * TODO: What if there was a Singleton macro which automatically created the property for us?
-   */
-  public static var instance(get, never):SongRegistry;
-
-  static var _instance:Null<SongRegistry> = null;
-
-  static function get_instance():SongRegistry
-  {
-    if (_instance == null) _instance = new SongRegistry();
-    return _instance;
-  }
-
   public function new()
   {
     super('SONG', 'songs', SONG_METADATA_VERSION_RULE);
@@ -69,7 +57,7 @@ class SongRegistry extends BaseRegistry<Song, SongMetadata>
 
     for (entryCls in scriptedEntryClassNames)
     {
-      var entry:Song = createScriptedEntry(entryCls);
+      var entry:Null<Song> = createScriptedEntry(entryCls);
 
       if (entry != null)
       {
@@ -417,16 +405,6 @@ class SongRegistry extends BaseRegistry<Song, SongMetadata>
     }
   }
 
-  function createScriptedEntry(clsName:String):Song
-  {
-    return ScriptedSong.init(clsName, "unknown");
-  }
-
-  function getScriptedClassNames():Array<String>
-  {
-    return ScriptedSong.listScriptClasses();
-  }
-
   function loadEntryMetadataFile(id:String, ?variation:String):Null<JsonFile>
   {
     variation = variation == null ? Constants.DEFAULT_VARIATION : variation;
diff --git a/source/funkin/play/notes/notestyle/NoteStyle.hx b/source/funkin/play/notes/notestyle/NoteStyle.hx
index dd0885751..0bdc507e8 100644
--- a/source/funkin/play/notes/notestyle/NoteStyle.hx
+++ b/source/funkin/play/notes/notestyle/NoteStyle.hx
@@ -18,13 +18,9 @@ using funkin.data.animation.AnimationData.AnimationDataUtil;
  * and provides convenience methods for building sprites based on them.
  */
 @:nullSafety
+@:build(funkin.util.macro.EntryMacro.build(funkin.data.notestyle.NoteStyleRegistry))
 class NoteStyle implements IRegistryEntry<NoteStyleData>
 {
-  /**
-   * The ID of the note style.
-   */
-  public final id:String;
-
   /**
    * Note style data as parsed from the JSON file.
    */
@@ -36,9 +32,10 @@ class NoteStyle implements IRegistryEntry<NoteStyleData>
    */
   var fallback(get, never):Null<NoteStyle>;
 
-  function get_fallback():Null<NoteStyle> {
+  function get_fallback():Null<NoteStyle>
+  {
     if (_data == null || _data.fallback == null) return null;
-    return NoteStyleRegistry.instance.fetchEntry(_data.fallback);
+    return registryInstance.fetchEntry(_data.fallback);
   }
 
   /**
@@ -880,16 +877,9 @@ class NoteStyle implements IRegistryEntry<NoteStyleData>
     }
   }
 
-  public function destroy():Void {}
-
-  public function toString():String
-  {
-    return 'NoteStyle($id)';
-  }
-
   static function _fetchData(id:String):NoteStyleData
   {
-    var result = NoteStyleRegistry.instance.parseEntryDataWithMigration(id, NoteStyleRegistry.instance.fetchEntryVersion(id));
+    var result = registryInstance.parseEntryDataWithMigration(id, registryInstance.fetchEntryVersion(id));
 
     if (result == null)
     {
diff --git a/source/funkin/play/song/Song.hx b/source/funkin/play/song/Song.hx
index 20d2f75a4..40d4cb789 100644
--- a/source/funkin/play/song/Song.hx
+++ b/source/funkin/play/song/Song.hx
@@ -28,6 +28,7 @@ import funkin.util.SortUtil;
  * can be used to perform custom gameplay behaviors only on specific songs.
  */
 @:nullSafety
+@:build(funkin.util.macro.EntryMacro.build(funkin.data.song.SongRegistry))
 class Song implements IPlayStateScriptedClass implements IRegistryEntry<SongMetadata>
 {
   /**
@@ -65,19 +66,6 @@ class Song implements IPlayStateScriptedClass implements IRegistryEntry<SongMeta
    */
   public static final DEFAULT_SCROLLSPEED:Float = 1.0;
 
-  /**
-   * The internal ID of the song.
-   */
-  public final id:String;
-
-  /**
-   * Song metadata as parsed from the JSON file.
-   * This is the data for the `default` variation specifically,
-   * and is needed for the IRegistryEntry interface.
-   * Will only be null if the song data could not be loaded.
-   */
-  public final _data:Null<SongMetadata>;
-
   // key = variation id, value = metadata
   final _metadata:Map<String, SongMetadata>;
 
@@ -624,13 +612,6 @@ class Song implements IPlayStateScriptedClass implements IRegistryEntry<SongMeta
     }
   }
 
-  public function toString():String
-  {
-    return 'Song($id)';
-  }
-
-  public function destroy():Void {}
-
   public function onPause(event:PauseScriptEvent):Void {};
 
   public function onResume(event:ScriptEvent):Void {};
diff --git a/source/funkin/ui/freeplay/charselect/PlayableCharacter.hx b/source/funkin/ui/freeplay/charselect/PlayableCharacter.hx
index 408a91672..6215a64bd 100644
--- a/source/funkin/ui/freeplay/charselect/PlayableCharacter.hx
+++ b/source/funkin/ui/freeplay/charselect/PlayableCharacter.hx
@@ -10,18 +10,9 @@ import funkin.play.scoring.Scoring.ScoringRank;
  * Can be scripted to override each function, for custom behavior.
  */
 @:nullSafety
+@:build(funkin.util.macro.EntryMacro.build(funkin.data.freeplay.player.PlayerRegistry))
 class PlayableCharacter implements IRegistryEntry<PlayerData>
 {
-  /**
-   * The ID of the playable character.
-   */
-  public final id:String;
-
-  /**
-   * Playable character data as parsed from the JSON file.
-   */
-  public final _data:Null<PlayerData>;
-
   /**
    * @param id The ID of the JSON file to parse.
    */
@@ -156,25 +147,4 @@ class PlayableCharacter implements IRegistryEntry<PlayerData>
   {
     return _data?.unlocked ?? true;
   }
-
-  /**
-   * Called when the character is destroyed.
-   * TODO: Document when this gets called
-   */
-  public function destroy():Void {}
-
-  public function toString():String
-  {
-    return 'PlayableCharacter($id)';
-  }
-
-  /**
-   * Retrieve and parse the JSON data for a playable character by ID.
-   * @param id The ID of the character
-   * @return The parsed player data, or null if not found or invalid
-   */
-  static function _fetchData(id:String):Null<PlayerData>
-  {
-    return PlayerRegistry.instance.parseEntryDataWithMigration(id, PlayerRegistry.instance.fetchEntryVersion(id));
-  }
 }
diff --git a/source/funkin/util/macro/EntryMacro.hx b/source/funkin/util/macro/EntryMacro.hx
new file mode 100644
index 000000000..3e4937292
--- /dev/null
+++ b/source/funkin/util/macro/EntryMacro.hx
@@ -0,0 +1,238 @@
+package funkin.util.macro;
+
+import haxe.macro.Context;
+import haxe.macro.Expr;
+import haxe.macro.Type;
+
+using StringTools;
+
+class EntryMacro
+{
+  public static macro function build(registryExpr:ExprOf<Class<Dynamic>>):Array<Field>
+  {
+    var fields = Context.getBuildFields();
+
+    var cls = Context.getLocalClass().get();
+
+    var entryData = getEntryData(cls);
+
+    buildIdField(fields);
+
+    buildDataField(entryData, fields);
+
+    buildRegistryInstanceField(registryExpr, fields);
+
+    buildFetchDataField(entryData, fields);
+
+    buildToStringField(cls, fields);
+
+    buildDestroyField(cls, fields);
+
+    return fields;
+  }
+
+  #if macro
+  static function shouldBuildField(name:String, fields:Array<Dynamic>):Bool // fields can be Array<Field> or Array<ClassField>
+  {
+    for (field in fields)
+    {
+      if (field.name == name)
+      {
+        return false;
+      }
+    }
+    return true;
+  }
+
+  static function getEntryData(cls:ClassType):Dynamic // DefType or ClassType
+  {
+    switch (cls.interfaces[0].params[0])
+    {
+      case Type.TInst(t, _):
+        return t.get();
+      case Type.TType(t, _):
+        return t.get();
+      default:
+        throw 'Entry Data is not a class or typedef';
+    }
+  }
+
+  static function buildIdField(fields:Array<Field>):Void
+  {
+    if (!shouldBuildField('id', fields))
+    {
+      return;
+    }
+
+    fields.push(
+      {
+        name: 'id',
+        access: [Access.APublic, Access.AFinal],
+        kind: FieldType.FVar((macro :String)),
+        pos: Context.currentPos()
+      });
+  }
+
+  static function buildDataField(entryData:Dynamic, fields:Array<Field>):Void
+  {
+    if (!shouldBuildField('_data', fields))
+    {
+      return;
+    }
+
+    fields.push(
+      {
+        name: '_data',
+        access: [Access.APublic, Access.AFinal],
+        kind: FieldType.FVar(ComplexType.TPath(
+          {
+            pack: [],
+            name: 'Null',
+            params: [
+              TypeParam.TPType(ComplexType.TPath(
+                {
+                  pack: entryData.pack,
+                  name: entryData.name
+                }))
+            ]
+          })),
+        pos: Context.currentPos()
+      });
+  }
+
+  static function buildRegistryInstanceField(registryExpr:ExprOf<Class<Dynamic>>, fields:Array<Field>):Void
+  {
+    if (!shouldBuildField('registryInstance', fields))
+    {
+      return;
+    }
+
+    var registryCls = MacroUtil.getClassTypeFromExpr(registryExpr);
+
+    fields.push(
+      {
+        name: 'registryInstance',
+        access: [Access.APrivate, Access.AStatic],
+        kind: FieldType.FProp("get", "never", ComplexType.TPath(
+          {
+            pack: registryCls.pack,
+            name: registryCls.name,
+            params: []
+          })),
+        pos: Context.currentPos()
+      });
+
+    fields.push(
+      {
+        name: 'get_registryInstance',
+        access: [Access.APrivate, Access.AStatic],
+        kind: FFun(
+          {
+            args: [],
+            expr: macro
+            {
+              return ${registryExpr}.instance;
+            },
+            params: [],
+            ret: ComplexType.TPath(
+              {
+                pack: registryCls.pack,
+                name: registryCls.name,
+                params: []
+              })
+          }),
+        pos: Context.currentPos()
+      });
+  }
+
+  static function buildFetchDataField(entryData:Dynamic, fields:Array<Field>):Void
+  {
+    if (!shouldBuildField('_fetchData', fields))
+    {
+      return;
+    }
+
+    fields.push(
+      {
+        name: '_fetchData',
+        access: [Access.AStatic, Access.APrivate],
+        kind: FieldType.FFun(
+          {
+            args: [
+              {
+                name: 'id',
+                type: (macro :String)
+              }
+            ],
+            expr: macro
+            {
+              return registryInstance.parseEntryDataWithMigration(id, registryInstance.fetchEntryVersion(id));
+            },
+            params: [],
+            ret: ComplexType.TPath(
+              {
+                pack: [],
+                name: 'Null',
+                params: [
+                  TypeParam.TPType(ComplexType.TPath(
+                    {
+                      pack: entryData.pack,
+                      name: entryData.name
+                    }))
+                ]
+              })
+          }),
+        pos: Context.currentPos()
+      });
+  }
+
+  static function buildToStringField(cls:ClassType, fields:Array<Field>):Void
+  {
+    if (!shouldBuildField('toString', fields))
+    {
+      return;
+    }
+
+    fields.push(
+      {
+        name: 'toString',
+        access: [Access.APublic],
+        kind: FieldType.FFun(
+          {
+            args: [],
+            expr: macro
+            {
+              return $v{cls.name} + '(' + id + ')';
+            },
+            params: [],
+            ret: (macro :String)
+          }),
+        pos: Context.currentPos()
+      });
+  }
+
+  static function buildDestroyField(cls:ClassType, fields:Array<Field>):Void
+  {
+    if (!shouldBuildField('destroy', fields) || !shouldBuildField('destroy', cls.superClass?.t.get().fields.get() ?? []))
+    {
+      return;
+    }
+
+    fields.push(
+      {
+        name: 'destroy',
+        access: [Access.APublic],
+        kind: FieldType.FFun(
+          {
+            args: [],
+            expr: macro
+            {
+              return;
+            },
+            params: []
+          }),
+        pos: Context.currentPos()
+      });
+  }
+  #end
+}
diff --git a/source/funkin/util/macro/RegistryMacro.hx b/source/funkin/util/macro/RegistryMacro.hx
new file mode 100644
index 000000000..5aba301bc
--- /dev/null
+++ b/source/funkin/util/macro/RegistryMacro.hx
@@ -0,0 +1,351 @@
+package funkin.util.macro;
+
+import haxe.macro.Context;
+import haxe.macro.Expr;
+import haxe.macro.Type;
+
+using StringTools;
+
+class RegistryMacro
+{
+  public static macro function build():Array<Field>
+  {
+    var fields = Context.getBuildFields();
+
+    var cls = Context.getLocalClass().get();
+
+    var typeParams = getTypeParams(cls);
+    var entryCls = typeParams.entryCls;
+    var jsonCls = typeParams.jsonCls;
+    var scriptedEntryCls = getScriptedEntryClass(entryCls);
+
+    buildInstanceField(cls, fields);
+
+    buildGetScriptedClassNamesField(scriptedEntryCls, fields);
+
+    buildCreateScriptedEntryField(entryCls, scriptedEntryCls, fields);
+
+    buildParseEntryDataField(jsonCls, fields);
+
+    buildParseEntryDataRawField(jsonCls, fields);
+
+    return fields;
+  }
+
+  #if macro
+  static function shouldBuildField(name:String, fields:Array<Dynamic>):Bool // fields can be Array<Field> or Array<ClassField>
+  {
+    for (field in fields)
+    {
+      if (field.name == name)
+      {
+        return false;
+      }
+    }
+    return true;
+  }
+
+  static function getTypeParams(cls:ClassType):RegistryTypeParams
+  {
+    switch (cls.superClass.t.get().kind)
+    {
+      case KGenericInstance(_, params):
+        var typeParams:Array<Dynamic> = [];
+        for (param in params)
+        {
+          switch (param)
+          {
+            case TInst(t, _):
+              typeParams.push(t.get());
+            case TType(t, _):
+              typeParams.push(t.get());
+            default:
+              throw 'Not a class';
+          }
+        }
+        return {entryCls: typeParams[0], jsonCls: typeParams[1]};
+      default:
+        throw 'Not in the correct format';
+    }
+  }
+
+  static function getScriptedEntryClass(entryCls:ClassType):ClassType
+  {
+    var scriptedEntryClsName = entryCls.pack.join('.') + '.Scripted' + entryCls.name;
+    switch (Context.getType(scriptedEntryClsName))
+    {
+      case Type.TInst(t, _):
+        return t.get();
+      default:
+        throw 'Not A Class (${scriptedEntryClsName})';
+    };
+  }
+
+  static function buildInstanceField(cls:ClassType, fields:Array<Field>):Void
+  {
+    if (!shouldBuildField('instance', fields))
+    {
+      return;
+    }
+
+    fields.push(
+      {
+        name: '_instance',
+        access: [Access.APrivate, Access.AStatic],
+        kind: FieldType.FVar(ComplexType.TPath(
+          {
+            pack: [],
+            name: 'Null',
+            params: [
+              TypeParam.TPType(ComplexType.TPath(
+                {
+                  pack: cls.pack,
+                  name: cls.name,
+                  params: []
+                }))
+            ]
+          })),
+        pos: Context.currentPos()
+      });
+
+    fields.push(
+      {
+        name: 'instance',
+        access: [Access.APublic, Access.AStatic],
+        kind: FieldType.FProp("get", "never", ComplexType.TPath(
+          {
+            pack: cls.pack,
+            name: cls.name,
+            params: []
+          })),
+        pos: Context.currentPos()
+      });
+
+    var newStrExpr = 'new ${cls.pack.join('.')}.${cls.name}()';
+    var newExpr = Context.parse(newStrExpr, Context.currentPos());
+
+    fields.push(
+      {
+        name: 'get_instance',
+        access: [Access.APrivate, Access.AStatic],
+        kind: FFun(
+          {
+            args: [],
+            expr: macro
+            {
+              if (_instance == null)
+              {
+                _instance = ${newExpr};
+              }
+              return _instance;
+            },
+            params: [],
+            ret: ComplexType.TPath(
+              {
+                pack: cls.pack,
+                name: cls.name,
+                params: []
+              })
+          }),
+        pos: Context.currentPos()
+      });
+  }
+
+  static function buildGetScriptedClassNamesField(scriptedEntryCls:ClassType, fields:Array<Field>):Void
+  {
+    if (!shouldBuildField('getScriptedClassNames', fields))
+    {
+      return;
+    }
+
+    var scriptedEntryExpr = Context.parse('${scriptedEntryCls.pack.join('.')}.${scriptedEntryCls.name}', Context.currentPos());
+
+    fields.push(
+      {
+        name: 'getScriptedClassNames',
+        access: [Access.APrivate],
+        kind: FieldType.FFun(
+          {
+            args: [],
+            expr: macro
+            {
+              return ${scriptedEntryExpr}.listScriptClasses();
+            },
+            params: [],
+            ret: (macro :Array<String>)
+          }),
+        pos: Context.currentPos()
+      });
+  }
+
+  static function buildCreateScriptedEntryField(entryCls:ClassType, scriptedEntryCls:ClassType, fields:Array<Field>):Void
+  {
+    if (!shouldBuildField('createScriptedEntry', fields))
+    {
+      return;
+    }
+
+    var scriptedStrExpr = '${scriptedEntryCls.pack.join('.')}.${scriptedEntryCls.name}.init(clsName, \'unknown\')';
+    var scriptedInitExpr = Context.parse(scriptedStrExpr, Context.currentPos());
+
+    fields.push(
+      {
+        name: 'createScriptedEntry',
+        access: [Access.APrivate],
+        kind: FieldType.FFun(
+          {
+            args: [
+              {
+                name: 'clsName',
+                type: (macro :String)
+              }
+            ],
+            expr: macro
+            {
+              return ${scriptedInitExpr};
+            },
+            params: [],
+            ret: ComplexType.TPath(
+              {
+                pack: [],
+                name: 'Null',
+                params: [
+                  TypeParam.TPType(ComplexType.TPath(
+                    {
+                      pack: entryCls.pack,
+                      name: entryCls.name
+                    }))
+                ]
+              })
+          }),
+        pos: Context.currentPos()
+      });
+  }
+
+  static function buildParseEntryDataField(jsonCls:Dynamic, fields:Array<Field>):Void
+  {
+    if (!shouldBuildField('parseEntryData', fields))
+    {
+      return;
+    }
+
+    var jsonParserNewStrExpr = 'new json2object.JsonParser<${jsonCls.pack.join('.')}.${jsonCls.name}>()';
+    var jsonParserNewExpr = Context.parse(jsonParserNewStrExpr, Context.currentPos());
+
+    fields.push(
+      {
+        name: 'parseEntryData',
+        access: [Access.APublic],
+        kind: FieldType.FFun(
+          {
+            args: [
+              {
+                name: 'id',
+                type: (macro :String)
+              }
+            ],
+            expr: macro
+            {
+              var parser = ${jsonParserNewExpr};
+              parser.ignoreUnknownVariables = false;
+
+              switch (loadEntryFile(id))
+              {
+                case {fileName: fileName, contents: contents}:
+                  parser.fromJson(contents, fileName);
+                default:
+                  return null;
+              }
+
+              if (parser.errors.length > 0)
+              {
+                printErrors(parser.errors, id);
+                return null;
+              }
+              return parser.value;
+            },
+            params: [],
+            ret: ComplexType.TPath(
+              {
+                pack: [],
+                name: 'Null',
+                params: [
+                  TypeParam.TPType(ComplexType.TPath(
+                    {
+                      pack: jsonCls.pack,
+                      name: jsonCls.name
+                    }))
+                ]
+              })
+          }),
+        pos: Context.currentPos()
+      });
+  }
+
+  static function buildParseEntryDataRawField(jsonCls:Dynamic, fields:Array<Field>):Void
+  {
+    if (!shouldBuildField('parseEntryDataRaw', fields))
+    {
+      return;
+    }
+
+    var jsonParserNewStrExpr = 'new json2object.JsonParser<${jsonCls.pack.join('.')}.${jsonCls.name}>()';
+    var jsonParserNewExpr = Context.parse(jsonParserNewStrExpr, Context.currentPos());
+
+    fields.push(
+      {
+        name: 'parseEntryDataRaw',
+        access: [Access.APublic],
+        kind: FieldType.FFun(
+          {
+            args: [
+              {
+                name: 'contents',
+                type: (macro :String)
+              },
+              {
+                name: 'fileName',
+                type: (macro :Null<String>),
+                opt: true
+              }
+            ],
+            expr: macro
+            {
+              var parser = ${jsonParserNewExpr};
+              parser.ignoreUnknownVariables = false;
+              parser.fromJson(contents, fileName);
+
+              if (parser.errors.length > 0)
+              {
+                printErrors(parser.errors, fileName);
+                return null;
+              }
+              return parser.value;
+            },
+            params: [],
+            ret: ComplexType.TPath(
+              {
+                pack: [],
+                name: 'Null',
+                params: [
+                  TypeParam.TPType(ComplexType.TPath(
+                    {
+                      pack: jsonCls.pack,
+                      name: jsonCls.name
+                    }))
+                ]
+              })
+          }),
+        pos: Context.currentPos()
+      });
+  }
+  #end
+}
+
+#if macro
+typedef RegistryTypeParams =
+{
+  var entryCls:ClassType;
+  var jsonCls:Dynamic; // DefType or ClassType
+}
+#end