In Altforms, they also add extra effects to certain Abilities, and can be used to change a Pokémon's form when breeding or evolving. Depending on which plate Arceus is holding, the move Judgment changes type. All of the plates power-up moves of that specific type, and you can also give Arceus the plate to change its type. There is a plate for every type except Normal. A plate is a held item that can be given to Pokémon introduced in Generation IV.