In the Forest of Okoya, Koko is a feral kid who has been raised as a Pokémon by the Mythological Pokémon Zarude. Koko has matured never ever doubting that he is a Pokémon despite the fact that he can't truly make use of any kind of steps. Ash Ketchum as well as Pikachu satisfy Koko and assist him protect the Great Tree from the jagged scientist Dr. Zed.