One Piece: Clockwork Island Adventure

Clockwork Island Adventure is the second One Piece theatrical film, following the Straw Hat crew to the mysterious Clockwork Island — a mechanized, gear-driven island controlled by the Trump Siblings, a pirate band who have stolen the Going Merry. When the crew's ship is taken, they must infiltrate the island and recover it, fighting their way through increasingly eccentric enemies. The film introduces Borodo and Akisu, two orphaned siblings who serve as the emotional center of the story — their hope to reach the "land of dreams" resonates with Luffy's own ambitions.

Released in 2001, Clockwork Island Adventure is notable for its mechanical setting, which predates many later One Piece story elements involving technology and unusual island design. The animation shows a step up from the first film, and the Trump Siblings are memorable in their comedic villainy. While still entirely non-canonical, this film is generally regarded as a modest improvement over its predecessor and a solid early entry in the franchise's theatrical lineup. The crew dynamic — with the full pre-Chopper lineup of Luffy, Zoro, Nami, Usopp, and Sanji — makes it a fun adventure for fans of the East Blue era.