diff --git a/src/data/pokemon-forms.ts b/src/data/pokemon-forms.ts
index 2db0ed54294..9faaca682a0 100644
--- a/src/data/pokemon-forms.ts
+++ b/src/data/pokemon-forms.ts
@@ -727,23 +727,23 @@ export const pokemonFormChanges: PokemonFormChanges = {
     new SpeciesFormChange(Species.SHAYMIN, "land", "sky", new SpeciesFormChangeItemTrigger(FormChangeItem.GRACIDEA)),
   ],
   [Species.ARCEUS]: [
-    new SpeciesFormChange(Species.ARCEUS, "normal", "fighting", new SpeciesFormChangeItemTrigger(FormChangeItem.FIST_PLATE)),
-    new SpeciesFormChange(Species.ARCEUS, "normal", "flying", new SpeciesFormChangeItemTrigger(FormChangeItem.SKY_PLATE)),
-    new SpeciesFormChange(Species.ARCEUS, "normal", "poison", new SpeciesFormChangeItemTrigger(FormChangeItem.TOXIC_PLATE)),
-    new SpeciesFormChange(Species.ARCEUS, "normal", "ground", new SpeciesFormChangeItemTrigger(FormChangeItem.EARTH_PLATE)),
-    new SpeciesFormChange(Species.ARCEUS, "normal", "rock", new SpeciesFormChangeItemTrigger(FormChangeItem.STONE_PLATE)),
-    new SpeciesFormChange(Species.ARCEUS, "normal", "bug", new SpeciesFormChangeItemTrigger(FormChangeItem.INSECT_PLATE)),
-    new SpeciesFormChange(Species.ARCEUS, "normal", "ghost", new SpeciesFormChangeItemTrigger(FormChangeItem.SPOOKY_PLATE)),
-    new SpeciesFormChange(Species.ARCEUS, "normal", "steel", new SpeciesFormChangeItemTrigger(FormChangeItem.IRON_PLATE)),
-    new SpeciesFormChange(Species.ARCEUS, "normal", "fire", new SpeciesFormChangeItemTrigger(FormChangeItem.FLAME_PLATE)),
-    new SpeciesFormChange(Species.ARCEUS, "normal", "water", new SpeciesFormChangeItemTrigger(FormChangeItem.SPLASH_PLATE)),
-    new SpeciesFormChange(Species.ARCEUS, "normal", "grass", new SpeciesFormChangeItemTrigger(FormChangeItem.MEADOW_PLATE)),
-    new SpeciesFormChange(Species.ARCEUS, "normal", "electric", new SpeciesFormChangeItemTrigger(FormChangeItem.ZAP_PLATE)),
-    new SpeciesFormChange(Species.ARCEUS, "normal", "psychic", new SpeciesFormChangeItemTrigger(FormChangeItem.MIND_PLATE)),
-    new SpeciesFormChange(Species.ARCEUS, "normal", "ice", new SpeciesFormChangeItemTrigger(FormChangeItem.ICICLE_PLATE)),
-    new SpeciesFormChange(Species.ARCEUS, "normal", "dragon", new SpeciesFormChangeItemTrigger(FormChangeItem.DRACO_PLATE)),
-    new SpeciesFormChange(Species.ARCEUS, "normal", "dark", new SpeciesFormChangeItemTrigger(FormChangeItem.DREAD_PLATE)),
-    new SpeciesFormChange(Species.ARCEUS, "normal", "fairy", new SpeciesFormChangeItemTrigger(FormChangeItem.PIXIE_PLATE))
+    new SpeciesFormChange(Species.ARCEUS, "normal", "fighting", new SpeciesFormChangeItemTrigger(FormChangeItem.FIST_PLATE), true, new SpeciesFormChangeCondition((p) => p.hasAbility(Abilities.MULTITYPE))),
+    new SpeciesFormChange(Species.ARCEUS, "normal", "flying", new SpeciesFormChangeItemTrigger(FormChangeItem.SKY_PLATE), true, new SpeciesFormChangeCondition((p) => p.hasAbility(Abilities.MULTITYPE))),
+    new SpeciesFormChange(Species.ARCEUS, "normal", "poison", new SpeciesFormChangeItemTrigger(FormChangeItem.TOXIC_PLATE), true, new SpeciesFormChangeCondition((p) => p.hasAbility(Abilities.MULTITYPE))),
+    new SpeciesFormChange(Species.ARCEUS, "normal", "ground", new SpeciesFormChangeItemTrigger(FormChangeItem.EARTH_PLATE), true, new SpeciesFormChangeCondition((p) => p.hasAbility(Abilities.MULTITYPE))),
+    new SpeciesFormChange(Species.ARCEUS, "normal", "rock", new SpeciesFormChangeItemTrigger(FormChangeItem.STONE_PLATE), true, new SpeciesFormChangeCondition((p) => p.hasAbility(Abilities.MULTITYPE))),
+    new SpeciesFormChange(Species.ARCEUS, "normal", "bug", new SpeciesFormChangeItemTrigger(FormChangeItem.INSECT_PLATE), true, new SpeciesFormChangeCondition((p) => p.hasAbility(Abilities.MULTITYPE))),
+    new SpeciesFormChange(Species.ARCEUS, "normal", "ghost", new SpeciesFormChangeItemTrigger(FormChangeItem.SPOOKY_PLATE), true, new SpeciesFormChangeCondition((p) => p.hasAbility(Abilities.MULTITYPE))),
+    new SpeciesFormChange(Species.ARCEUS, "normal", "steel", new SpeciesFormChangeItemTrigger(FormChangeItem.IRON_PLATE), true, new SpeciesFormChangeCondition((p) => p.hasAbility(Abilities.MULTITYPE))),
+    new SpeciesFormChange(Species.ARCEUS, "normal", "fire", new SpeciesFormChangeItemTrigger(FormChangeItem.FLAME_PLATE), true, new SpeciesFormChangeCondition((p) => p.hasAbility(Abilities.MULTITYPE))),
+    new SpeciesFormChange(Species.ARCEUS, "normal", "water", new SpeciesFormChangeItemTrigger(FormChangeItem.SPLASH_PLATE), true, new SpeciesFormChangeCondition((p) => p.hasAbility(Abilities.MULTITYPE))),
+    new SpeciesFormChange(Species.ARCEUS, "normal", "grass", new SpeciesFormChangeItemTrigger(FormChangeItem.MEADOW_PLATE), true, new SpeciesFormChangeCondition((p) => p.hasAbility(Abilities.MULTITYPE))),
+    new SpeciesFormChange(Species.ARCEUS, "normal", "electric", new SpeciesFormChangeItemTrigger(FormChangeItem.ZAP_PLATE), true, new SpeciesFormChangeCondition((p) => p.hasAbility(Abilities.MULTITYPE))),
+    new SpeciesFormChange(Species.ARCEUS, "normal", "psychic", new SpeciesFormChangeItemTrigger(FormChangeItem.MIND_PLATE), true, new SpeciesFormChangeCondition((p) => p.hasAbility(Abilities.MULTITYPE))),
+    new SpeciesFormChange(Species.ARCEUS, "normal", "ice", new SpeciesFormChangeItemTrigger(FormChangeItem.ICICLE_PLATE), true, new SpeciesFormChangeCondition((p) => p.hasAbility(Abilities.MULTITYPE))),
+    new SpeciesFormChange(Species.ARCEUS, "normal", "dragon", new SpeciesFormChangeItemTrigger(FormChangeItem.DRACO_PLATE), true, new SpeciesFormChangeCondition((p) => p.hasAbility(Abilities.MULTITYPE))),
+    new SpeciesFormChange(Species.ARCEUS, "normal", "dark", new SpeciesFormChangeItemTrigger(FormChangeItem.DREAD_PLATE), true, new SpeciesFormChangeCondition((p) => p.hasAbility(Abilities.MULTITYPE))),
+    new SpeciesFormChange(Species.ARCEUS, "normal", "fairy", new SpeciesFormChangeItemTrigger(FormChangeItem.PIXIE_PLATE), true, new SpeciesFormChangeCondition((p) => p.hasAbility(Abilities.MULTITYPE))),
   ],
   [Species.DARMANITAN]: [
     new SpeciesFormChange(Species.DARMANITAN, "", "zen", new SpeciesFormChangeManualTrigger(), true),
@@ -813,23 +813,23 @@ export const pokemonFormChanges: PokemonFormChanges = {
     new SpeciesFormChange(Species.WISHIWASHI, "school", "", new SpeciesFormChangeManualTrigger(), true)
   ],
   [Species.SILVALLY]: [
-    new SpeciesFormChange(Species.SILVALLY, "normal", "fighting", new SpeciesFormChangeItemTrigger(FormChangeItem.FIGHTING_MEMORY)),
-    new SpeciesFormChange(Species.SILVALLY, "normal", "flying", new SpeciesFormChangeItemTrigger(FormChangeItem.FLYING_MEMORY)),
-    new SpeciesFormChange(Species.SILVALLY, "normal", "poison", new SpeciesFormChangeItemTrigger(FormChangeItem.POISON_MEMORY)),
-    new SpeciesFormChange(Species.SILVALLY, "normal", "ground", new SpeciesFormChangeItemTrigger(FormChangeItem.GROUND_MEMORY)),
-    new SpeciesFormChange(Species.SILVALLY, "normal", "rock", new SpeciesFormChangeItemTrigger(FormChangeItem.ROCK_MEMORY)),
-    new SpeciesFormChange(Species.SILVALLY, "normal", "bug", new SpeciesFormChangeItemTrigger(FormChangeItem.BUG_MEMORY)),
-    new SpeciesFormChange(Species.SILVALLY, "normal", "ghost", new SpeciesFormChangeItemTrigger(FormChangeItem.GHOST_MEMORY)),
-    new SpeciesFormChange(Species.SILVALLY, "normal", "steel", new SpeciesFormChangeItemTrigger(FormChangeItem.STEEL_MEMORY)),
-    new SpeciesFormChange(Species.SILVALLY, "normal", "fire", new SpeciesFormChangeItemTrigger(FormChangeItem.FIRE_MEMORY)),
-    new SpeciesFormChange(Species.SILVALLY, "normal", "water", new SpeciesFormChangeItemTrigger(FormChangeItem.WATER_MEMORY)),
-    new SpeciesFormChange(Species.SILVALLY, "normal", "grass", new SpeciesFormChangeItemTrigger(FormChangeItem.GRASS_MEMORY)),
-    new SpeciesFormChange(Species.SILVALLY, "normal", "electric", new SpeciesFormChangeItemTrigger(FormChangeItem.ELECTRIC_MEMORY)),
-    new SpeciesFormChange(Species.SILVALLY, "normal", "psychic", new SpeciesFormChangeItemTrigger(FormChangeItem.PSYCHIC_MEMORY)),
-    new SpeciesFormChange(Species.SILVALLY, "normal", "ice", new SpeciesFormChangeItemTrigger(FormChangeItem.ICE_MEMORY)),
-    new SpeciesFormChange(Species.SILVALLY, "normal", "dragon", new SpeciesFormChangeItemTrigger(FormChangeItem.DRAGON_MEMORY)),
-    new SpeciesFormChange(Species.SILVALLY, "normal", "dark", new SpeciesFormChangeItemTrigger(FormChangeItem.DARK_MEMORY)),
-    new SpeciesFormChange(Species.SILVALLY, "normal", "fairy", new SpeciesFormChangeItemTrigger(FormChangeItem.FAIRY_MEMORY))
+    new SpeciesFormChange(Species.SILVALLY, "normal", "fighting", new SpeciesFormChangeItemTrigger(FormChangeItem.FIGHTING_MEMORY), true, new SpeciesFormChangeCondition((p) => p.hasAbility(Abilities.RKS_SYSTEM))),
+    new SpeciesFormChange(Species.SILVALLY, "normal", "flying", new SpeciesFormChangeItemTrigger(FormChangeItem.FLYING_MEMORY), true, new SpeciesFormChangeCondition((p) => p.hasAbility(Abilities.RKS_SYSTEM))),
+    new SpeciesFormChange(Species.SILVALLY, "normal", "poison", new SpeciesFormChangeItemTrigger(FormChangeItem.POISON_MEMORY), true, new SpeciesFormChangeCondition((p) => p.hasAbility(Abilities.RKS_SYSTEM))),
+    new SpeciesFormChange(Species.SILVALLY, "normal", "ground", new SpeciesFormChangeItemTrigger(FormChangeItem.GROUND_MEMORY), true, new SpeciesFormChangeCondition((p) => p.hasAbility(Abilities.RKS_SYSTEM))),
+    new SpeciesFormChange(Species.SILVALLY, "normal", "rock", new SpeciesFormChangeItemTrigger(FormChangeItem.ROCK_MEMORY), true, new SpeciesFormChangeCondition((p) => p.hasAbility(Abilities.RKS_SYSTEM))),
+    new SpeciesFormChange(Species.SILVALLY, "normal", "bug", new SpeciesFormChangeItemTrigger(FormChangeItem.BUG_MEMORY), true, new SpeciesFormChangeCondition((p) => p.hasAbility(Abilities.RKS_SYSTEM))),
+    new SpeciesFormChange(Species.SILVALLY, "normal", "ghost", new SpeciesFormChangeItemTrigger(FormChangeItem.GHOST_MEMORY), true, new SpeciesFormChangeCondition((p) => p.hasAbility(Abilities.RKS_SYSTEM))),
+    new SpeciesFormChange(Species.SILVALLY, "normal", "steel", new SpeciesFormChangeItemTrigger(FormChangeItem.STEEL_MEMORY), true, new SpeciesFormChangeCondition((p) => p.hasAbility(Abilities.RKS_SYSTEM))),
+    new SpeciesFormChange(Species.SILVALLY, "normal", "fire", new SpeciesFormChangeItemTrigger(FormChangeItem.FIRE_MEMORY), true, new SpeciesFormChangeCondition((p) => p.hasAbility(Abilities.RKS_SYSTEM))),
+    new SpeciesFormChange(Species.SILVALLY, "normal", "water", new SpeciesFormChangeItemTrigger(FormChangeItem.WATER_MEMORY), true, new SpeciesFormChangeCondition((p) => p.hasAbility(Abilities.RKS_SYSTEM))),
+    new SpeciesFormChange(Species.SILVALLY, "normal", "grass", new SpeciesFormChangeItemTrigger(FormChangeItem.GRASS_MEMORY), true, new SpeciesFormChangeCondition((p) => p.hasAbility(Abilities.RKS_SYSTEM))),
+    new SpeciesFormChange(Species.SILVALLY, "normal", "electric", new SpeciesFormChangeItemTrigger(FormChangeItem.ELECTRIC_MEMORY), true, new SpeciesFormChangeCondition((p) => p.hasAbility(Abilities.RKS_SYSTEM))),
+    new SpeciesFormChange(Species.SILVALLY, "normal", "psychic", new SpeciesFormChangeItemTrigger(FormChangeItem.PSYCHIC_MEMORY), true, new SpeciesFormChangeCondition((p) => p.hasAbility(Abilities.RKS_SYSTEM))),
+    new SpeciesFormChange(Species.SILVALLY, "normal", "ice", new SpeciesFormChangeItemTrigger(FormChangeItem.ICE_MEMORY), true, new SpeciesFormChangeCondition((p) => p.hasAbility(Abilities.RKS_SYSTEM))),
+    new SpeciesFormChange(Species.SILVALLY, "normal", "dragon", new SpeciesFormChangeItemTrigger(FormChangeItem.DRAGON_MEMORY), true, new SpeciesFormChangeCondition((p) => p.hasAbility(Abilities.RKS_SYSTEM))),
+    new SpeciesFormChange(Species.SILVALLY, "normal", "dark", new SpeciesFormChangeItemTrigger(FormChangeItem.DARK_MEMORY), true, new SpeciesFormChangeCondition((p) => p.hasAbility(Abilities.RKS_SYSTEM))),
+    new SpeciesFormChange(Species.SILVALLY, "normal", "fairy", new SpeciesFormChangeItemTrigger(FormChangeItem.FAIRY_MEMORY), true, new SpeciesFormChangeCondition((p) => p.hasAbility(Abilities.RKS_SYSTEM)))
   ],
   [Species.MINIOR]: [
     new SpeciesFormChange(Species.MINIOR, "red-meteor", "red", new SpeciesFormChangeManualTrigger(), true),