A defensive, heavy-set form used specifically after eating massive amounts of food (seen against Charlotte Cracker).
"Gear 4" (Gear Fourth) is a transformative combat technique used by , the protagonist of One Piece . It was first introduced in Chapter 784 , titled "Gear Fourth," during the climax of the Dressrosa Arc. The Mechanics gear 4 chapter
. By blowing massive amounts of air into his muscles—rather than his bones—and coating them in heavy Armament Haki, Luffy creates a pressurized state that gives him explosive "tension". Boundman (The All-Rounder): The first form we see. It’s bulky, bouncy, and allows Luffy to "fly" by kicking the air, mimicking the CP9’s Moon Walk. Tankman (The Ultimate Defense): Used primarily against Cracker, this form turns Luffy’s belly into a black hole of rubbery defense that counters attacks with double the force. Snakeman (The Speed King): Sacrifices defense for pure, unpredictable speed. Luffy’s punches accelerate every time they bounce off the air, making them nearly impossible to dodge. The Cost of Absolute Power Every "Gear" comes with a drawback, and Gear 4 is particularly brutal. It demands a massive amount of A defensive, heavy-set form used specifically after eating
By the end of Chapter 784, Luffy dominates the fight, launching Doflamingo through the palace and declaring, The Mechanics