In the depths of the Okoya Forest dwells a troop of mythical Pokémon known as Zarude, fiercely guarding their domain from outsiders. Amidst this wilderness, Koko, a human boy raised by a renegade Zarude, inhabits a world where his identity blurs between human and Pokémon. Encountering Satoshi and Pikachu, Koko finds his first human companion, sparking a journey of self-discovery. As a looming danger looms over the jungle, the foundations of bonds between humans and Pokémon, and the essence of parental love, face a formidable trial.