Tony Tony Chopper from One Piece
A reindeer who ate the Human-Human Fruit, Chopper gained human intelligence and the ability to speak. Through his self-invented “Rumble Balls,” he transforms between multiple forms that include various human-animal hybrids. The bizarre transformation spectrum ranges from an adorable tiny form to a monstrous beast with enhanced strength. His medical knowledge, combined with these physical transformations makes for an unlikely but effective combat medic character who confuses enemies with his unpredictable shifts.