Pokemon Diamond & Pearl

Ash arrives in the Sinnoh region ready for a new step toward becoming a Pokémon Master, but his journey begins with Pikachu being separated from him during another Team Rocket attack. While searching, he meets Dawn, a novice Trainer who dreams of becoming a top Pokémon Coordinator, and reunites with his longtime companion Brock.

Together they travel across Sinnoh through Gym battles and Pokémon Contests, while Ash develops a fierce rivalry with Paul, a talented Trainer whose ruthless philosophy clashes with everything Ash believes about partnership. Their adventures gradually draw them into Team Galactic's dangerous plans and toward the Sinnoh League where years of training will be tested.