From his early years in the East Blue to his current adventures as an Emperor of the Sea in the New World, Monkey D. Luffy has made leaps and bounds in his journey to become the next Pirate King in Eiichiro Oda's One Piece. In accordance with the stronger enemies he has encountered in his travels as Captain of the Straw Hat Pirates, Luffy has developed several transformations to boost his combat ability, reaching new heights of power in the process.