Pokemon Movie 23: Koko
English title: Pokémon the Movie: Secrets of the Jungle
Japanese title: 劇場版ポケットモンスター ココ
Type: Movie
Episodes: 1
Source: Game
Genres: Action, Adventure, Comedy, Fantasy
Studios: OLM
Producers: TV Tokyo, Shogakukan-Shueisha Productions, JR East Marketing & Communications
Duration: 1 hr 39 min
Rating: PG - Children

Deep within the Forest of Okoya, the Mythical Pokémon Zarude live in a troop and maintain a strict rule that forbids outsiders from entering their territory. Elsewhere in the jungle lives Koko, a human boy raised by a lone Zarude who left the troop. Koko has grown up never doubting that he is a Zarude. But one day, a chance meeting with Satoshi and Pikachu leaves Koko with his first human friend. Is he truly a Pokémon? Or is he, in fact, a human? When danger threatens the jungle, the bonds between Pokémon and human—and the love between parent and child—will be put to the test.

(Source: Official site)