Grand Trial Showdown (Pokémon: Graphic Collection)

The story follows Ash as he teams up with the Masked Royal for an exhilarating battle against the Revengers. His journey continues on Ula'ula Island, where he aims to take on the island kahuna, Nanu, in a grand trial. However, Nanu doubts Ash's readiness, setting the stage for Ash to demonstrate his skills and determination to win the challenge alongside his Pokémon friends.