diff --git a/src/modifier/modifier-type.ts b/src/modifier/modifier-type.ts
index 6b3365230..982f8a654 100644
--- a/src/modifier/modifier-type.ts
+++ b/src/modifier/modifier-type.ts
@@ -554,10 +554,10 @@ export class EvolutionItemModifierType extends PokemonModifierType implements Ge
     super(Utils.toReadableString(EvolutionItem[evolutionItem]), `Causes certain Pokémon to evolve`, (_type, args) => new Modifiers.EvolutionItemModifier(this, (args[0] as PlayerPokemon).id),
     (pokemon: PlayerPokemon) => {
       if (pokemonEvolutions.hasOwnProperty(pokemon.species.speciesId) && pokemonEvolutions[pokemon.species.speciesId].filter(e => e.item === this.evolutionItem
-          && (!e.condition || e.condition.predicate(pokemon))).length && (pokemon.formIndex == 0))
+          && (!e.condition || e.condition.predicate(pokemon))).length && (pokemon.getFormKey() !== SpeciesFormKey.GIGANTAMAX))
         return null;
       else if (pokemon.isFusion() && pokemonEvolutions.hasOwnProperty(pokemon.fusionSpecies.speciesId) && pokemonEvolutions[pokemon.fusionSpecies.speciesId].filter(e => e.item === this.evolutionItem
-        && (!e.condition || e.condition.predicate(pokemon))).length && (pokemon.fusionFormIndex == 0))
+        && (!e.condition || e.condition.predicate(pokemon))).length && (pokemon.getFusionFormKey() !== SpeciesFormKey.GIGANTAMAX))
         return null;
 
       return PartyUiHandler.NoEffectMessage;