One Piece: Defeat the Pirate Ganzak!

Luffy, Zolo, and Nami get seperated after a sea monster attacks them. Luffy wakes up on an island ruled by the pirate Ganzack where a girl, who's dad has been taken to work on a cannon, tries to fight against Ganzack. Now Luffy, Zolo, and Nami must fight against Ganzack, destroy the cannon, and free the people from Ganzack's reign. (tv.com)