Monkey D. Luffy uses for the first time in Episode 726 of the anime.
A popular question among One Piece fans!
Gear 4th is a powerful transformation that Luffy achieves by combining his Red Hawk ( Busoshoku Haki) with his Gear 3rd form. When activated, his body inflates like a balloon, and his muscles grow significantly. This form enhances Luffy's physical strength and agility, allowing him to deliver devastating attacks. which episode luffy uses gear 4
If you're interested in watching Luffy's Gear 4th debut, I recommend starting from episode 783, as it sets up the events leading to his transformation.
The significance of this moment extends beyond mere aesthetics. Unlike the speed of Gear Second or the blunt force of Gear Third, Gear Fourth utilizes elasticity in a revolutionary way: compression. By contracting his inflated muscles, Luffy creates immense tension, allowing him to bounce across the battlefield at incredible speeds and deliver strikes like the “Kong Gun”—a punch so powerful that it warps the air and sends Doflamingo flying through several city blocks. Episode 726 captures this moment of awe and terror, as even the unflappable Doflamingo is shown bleeding from the mouth, realizing that the "Straw Hat" has entered a realm he cannot easily follow. Monkey D
In the sprawling narrative of Eiichiro Oda’s One Piece , few moments carry as much raw intensity and narrative weight as the debut of a new Gear. Following the immense physical toll of Gear Second and the grotesque inflation of Gear Third, Monkey D. Luffy’s next evolution was not just a power-up—it was a desperate necessity. The first episode in which Luffy unleashes Gear Fourth is (titled “Gear Fourth! The Bouncy Man of Fury”). This transformation occurs during the climactic battle against the formidable Donquixote Doflamingo on the island of Dressrosa.
Since its debut, Gear 4 has become a staple of Luffy's combat arsenal, featuring multiple specialized forms for different high-stakes battles. Key Episodes for Gear 4 Forms Gear 4th is a powerful transformation that Luffy
Monkey D. Luffy first uses in Episode 726 , titled "Gear 4! The Phenomenal Boundman!" . This major power-up occurs during the climax of the Dressrosa Arc in his battle against Donquixote Doflamingo.