The Official Pokémon Fiction: Old Friends New Battles: Book 12

Ash and his friends from the Poke,on School are visiting his home region of Kanto. They're ready for lots of adventures! When they visit the Cerulean City Gym, Ash and Pikachu take on his old friend Misty and her Gyarados - who will win the mighty battle? Gotta catch 'em all!