The Straw Hats visit a recreational island, run by Baron Omatsuri, who asks them to complete a series of ordeals if they wish to stay on the island. Luffy accepts and the Straw Hats work together to complete them, but
One Piece: Clockwork Island Adventure
One Piece: The Desert Princess and the Pirates: Adventure in Alabasta
One Piece: Giant Mecha Soldier of Karakuri Castle
One Piece: Dead End Adventure