Deep in the jungle, far from any human settlement, you’ll find the Forest of Okoya—a Pokémon paradise forbidden to outsiders. In this jungle lives Koko, a human boy who has been raised as a Pokémon by the Mythical Pokémon Zarude. Koko has grown up never doubting that he is a Pokémon. But one day, a chance meeting with Ash and Pikachu leaves Koko with his first human friend. Is he truly a Pokémon? Or is he, in fact, a human?

[Source: official English website]