Implements more move effects

Plugins/PkmnLib.Plugin.Gen7/Scripts/Moves/Grudge.cs

@@ -0,0 +1,19 @@
+using System.Collections.Generic;
+using PkmnLib.Static.Utils;
+
+namespace PkmnLib.Plugin.Gen7.Scripts.Moves;
+
+[Script(ScriptCategory.Move, "grudge")]
+public class Grudge : Script
+{
+    /// <inheritdoc />
+    public override void OnSecondaryEffect(IExecutingMove move, IPokemon target, byte hit)
+    {
+        move.User.Volatile.StackOrAdd("grudge", () =>
+        {
+            move.User.Library.ScriptResolver.TryResolve(ScriptCategory.Pokemon, "grudge",
+                new Dictionary<StringKey, object?>(), out var script);
+            return script;
+        });
+    }
+}