"Ash has reached the next stage of his quest to become a Pokémon master, and he's going back to school. Since the moment he and Pikachu arrived in Alola, Ash has wanted to learn more about the amazing Pokémon there ... and more about Z-moves, special attacks that only Trainers who've passed the island challenge can use. Does Ash have what it takes to complete the challenge?"-- Provided by publisher.