The plot of the latest movie takes place in Okoya Forest, a haven for Pokémon safeguarded by stringent regulations that prohibit intruders from entering. It revolves around Koko, a youth who was nurtured by Pokémon and identifies himself as one. He regards the Mythical Pokémon Zarude as his paternal figure. Ash and Pikachu meet Koko while embarking on a quest. Unlike the prior films, this one emphasizes the idea of a "human nurtured by Pokémon," rather than the "connection between a trainer and their Pokémon."