Add dynamax buffs

src/field/pokemon.ts

@@ -1488,6 +1488,11 @@ export default abstract class Pokemon extends Phaser.GameObjects.Container {
     return this.isBoss();
   }
 
+  isMax(): boolean {
+    const maxForms = [SpeciesFormKey.GIGANTAMAX, SpeciesFormKey.GIGANTAMAX_RAPID, SpeciesFormKey.GIGANTAMAX_SINGLE, SpeciesFormKey.ETERNAMAX] as string[];
+    return maxForms.includes(this.getFormKey()) || maxForms.includes(this.getFusionFormKey());
+  }
+
   addTag(tagType: BattlerTagType, turnCount: integer = 0, sourceMove?: Moves, sourceId?: integer): boolean {
     const existingTag = this.getTag(tagType);
     if (existingTag) {