One Piece Episode 290 Apr 2026

In One Piece Episode 290, titled "Uncontrollable! Chopper's Forbidden Rumble," the story centers on desperate and terrifying sacrifice to save his friends during the Enies Lobby arc .

The result is the debut of , a transformation so powerful and "forbidden" that it destroys both ally and enemy alike. One Piece Episode 290

Facing the formidable CP9 agent , Chopper finds himself completely overwhelmed. After already consuming two Rumble Balls, which has left his transformations unstable and physically taxing, he realizes he cannot win in his current state. With the safety of the Straw Hat crew on the line, Chopper makes a fateful decision: he consumes a third Rumble Ball . The Birth of a Monster In One Piece Episode 290, titled "Uncontrollable

The episode is widely remembered by fans for its chilling atmosphere and the dramatic stakes it set for Chopper's character development. Facing the formidable CP9 agent , Chopper finds

“Wow. They really pulled off this fight well. It's a lot cooler looking animated. Monster Chopper's roar at the end was awesome too.” FanVerse · 19 years ago

: Chopper morphs into a gargantuan, primal beast that towers over the battlefield.

: The sudden shift from the small, cute doctor to a terrifying goliath leaves Kumadori in complete terror. Community Perspectives on the Episode