Rumble Ball, One Piece Wiki

The Rumble Ball is a special drug, developed by Tony Tony Chopper, meant to enhance Devil Fruit abilities. The Rumble Ball condenses various chemicals into a spherical yellow pill, similar to a jawbreaker in appearance. It is easily crushed with a single bite. Once ingested, the drug immediately "distorts the wavelength" of the user's Devil Fruit-enhanced biochemistry, creating a number of new abilities. In Chopper's case, nearly all of these entail special transformations that emphasize and com

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