He glanced at the episode number: 725. Luffy was losing. Badly.
Kenji shot out of his chair. His headset flew off. “YES!” he screamed, waking the old man sleeping in the corner.
Not at Doflamingo. Into the air.
Luffy's Gear 4 transformation is a significant moment in the series. According to the One Piece wiki and various fan sources, Luffy first uses Gear 4 in:
It was 2:00 AM. The final battle of the Dressrosa arc was playing out on his primary monitor. Doflamingo’s laugh— “Fufufufu” —cackled from the tinny speakers. Luffy, battered and nearly broken, was being thrown across the royal plateau like a ragdoll. Kenji’s heart pounded. He had avoided spoilers for three years. Three years of dodging YouTube thumbnails and forum posts. But now, with his hero on the ground and the birdcage closing in, he couldn’t take the suspense. what episode does luffy use gear 4
Kenji forgot to breathe.
When Gear 4 debuts, Luffy showcases a variety of moves that defy traditional physics: He glanced at the episode number: 725
The Mechanics: Because of the immense internal pressure, Luffy cannot stay still. He constantly bounces, which is why Doflamingo initially mocks the form—until he feels the speed and power behind it. Signature Moves in Episode 726
By Episode 726, the battle for the kingdom of Dressrosa has reached its breaking point. Donquixote Doflamingo, the Heavenly Yaksha, has proven to be an insurmountable wall for Luffy’s Gear 2 and Gear 3 techniques. With the "Birdcage" closing in and threatening to shred the entire island, Luffy realizes he needs a massive power boost to bypass Doflamingo’s Armament Haki and "Awakened" string powers. How Gear 4 Boundman Works Kenji shot out of his chair