Luffy coats his arm in Armament Haki before biting into his forearm. Then he blows an incredible amount of air into his body "Gear 4: Bounceman!" Once Luffy finished his transformation, he started to get into a stance and started to bounce in place "Names luffy, and im going to be king of the pirates, and i will beat you in the Dressrosa Colosseum Tournament!"