One Piece: Baron Omatsuri and the Secret Island

ワンピース the movie オマツリ男爵と秘密の島

Also known as One Piece - 6. Film: Baron Omatsuri und die geheimnisvolle Insel, One Piece - Movie 6 - Baron Omatsuri and the Secret Island, One Piece: Omatsuri Danshaku to Himitsu no Shima, One Piece Movie 06 - L'isola segreta del barone Omatsuri, 원피스 : 오마츠리 남작과 비밀의 섬

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 as the island's mysteries unfold, their lives and friendships are put to the test. It's up to Luffy to stop the Baron's plot and keep his crew together.