More abilities

Plugins/PkmnLib.Plugin.Gen7/Scripts/Abilities/RKSSystem.cs

@@ -0,0 +1,31 @@
+namespace PkmnLib.Plugin.Gen7.Scripts.Abilities;
+
+/// <summary>
+/// RKS System is an ability that changes the Pokémon's type based on its held Memory.
+///
+/// <see href="https://bulbapedia.bulbagarden.net/wiki/RKS_System_(Ability)">Bulbapedia - RKS System</see>
+/// </summary>
+[Script(ScriptCategory.Ability, "rks_system")]
+public class RKSSystem : Script
+{
+    /// <inheritdoc />
+    public override void OnAfterHeldItemChange(IPokemon pokemon, IItem? previous, IItem? item)
+    {
+        if (pokemon.Species.Name != "silvally")
+            return;
+        if (item is null && pokemon.Form.Name != "default")
+        {
+            pokemon.ChangeForm(pokemon.Species.GetDefaultForm());
+        }
+        else if (item is not null && item.Name.ToString().EndsWith("_memory", StringComparison.OrdinalIgnoreCase))
+        {
+            var memoryPrefix =
+                item.Name.ToString().Replace("_memory", string.Empty, StringComparison.OrdinalIgnoreCase);
+            var formName = $"silvally_{memoryPrefix}";
+            if (pokemon.Species.TryGetForm(formName, out var form))
+            {
+                pokemon.ChangeForm(form);
+            }
+        }
+    }
+}