Pokemon Season 15 BW Rival Destinies New foes, new friends, and dozens of never-before-seen Pokémon await Ash and Pikachu in Pokémon: BW Rival Destinies, the new season of the Pokémon animated series. As Ash and his friends continue to explore the Unova region, he’ll find himself up against the ultimate battle challenge: Alder, the Champion Master of Unova! His friends also face their own trials, one fighting for the right to continue her travels, another confronting a returning challenge from the past—