Hibachi, the best (and shortest) surfer on Shredder Beach bans Boomer and Brady from the beach after they tick him off. When efforts at befriending Hibachi fail, the boys end up challenging him to a Surf-Off, forgetting that they don't know how to surf.

The twins discover a cute little animal and decide to make him their pet. Unbeknownst to the boys, their pet, Pupaley, grows into a towering behemoth when angered. When the boys try to return him to the wild, he grows and makes they boys HIS pets.