When Gear 4 | Appear [patched]

Luffy first unveiled Gear 4 during the climax of the to combat the overwhelming power of Donquixote Doflamingo.

In his first use against Doflamingo, this nearly proved fatal. After a brutal onslaught, Luffy’s Gear Fourth timed out, and he fell helplessly to the ground. The only reason he survived was due to the citizens of Dressrosa and his allies (including the Tontatta tribe) physically carrying him away from Doflamingo while hiding and stalling for the ten minutes to pass.

Luffy did not unlock Gear Fourth through casual training. It was born from absolute necessity. Before its debut, Luffy faced Donquixote Doflamingo, a Warlord of the Sea with a terrifying mastery of his String-String Fruit. Doflamingo had already proven immune to Luffy’s Gear Second and Gear Third attacks, effortlessly blocking, dodging, or regenerating from them. when gear 4 appear

Gear Fourth (Gear 4 or Boundman) makes its first appearance in the One Piece manga and anime during the climactic battle of the Dressrosa Arc. This transformation represents a monumental leap in Monkey D. Luffy’s power, marking the first time he can truly stand toe-to-toe with the mightiest pirates of the New World.

Mechanically, Gear Four represents the culmination of Luffy’s training on Ruskaina, the island of darkness, during the two-year time skip. Unlike the previous gears, which relied largely on Luffy’s instinctual understanding of his body, Gear Four is the product of dedicated study and haki mastery. The introduction of "Python," where Luffy can curve his punches mid-air to chase opponents, symbolized a new level of tactical depth in his fighting style. He was no longer just a brawler relying on linear attacks; he had become a sniper using his own body as the projectile. Furthermore, the severe limitation placed on the form—a ten-minute window after usage where Luffy is completely helpless—grounded the power boost in reality. It added stakes to the fight against Doflamingo, transforming the climax of Dressrosa into a frantic race against time involving Luffy’s allies, proving that while Luffy had gained god-like power, he was still mortal. Luffy first unveiled Gear 4 during the climax

Luffy reveals Gear 4 when his previous forms (Gears 2 and 3) prove insufficient against Doflamingo's Awakened Devil Fruit powers and physical durability. He developed this technique during his two-year training on under Rayleigh’s guidance to combat the island's massive, powerful beasts. Variations of Gear 4

: Chapter 784 , titled "Gear 4," which was officially released on April 27, 2015. Luffy first mentions the move in the cliffhanger of the previous chapter, Chapter 783 . Anime Debut : Episode 726 , titled " Gear 4! The Phenomenal Boundman! ," which first aired on January 17, 2016. Context of Appearance The only reason he survived was due to

The appearance of Gear Fourth comes with a dramatic, life-threatening drawback. Due to the massive strain on his body and Haki, Luffy cannot maintain the form for long. Once it runs out, his Haki is completely depleted for approximately . During this time, he is left as a shriveled, immobile shell of himself, completely unable to use any Haki or even move properly.

: A defensive-focused form used against Charlotte Cracker after Luffy ate an immense amount of "Biscuit Soldiers". Debut : Chapter 842 / Episode 806.

Before this reveal, Luffy’s gears focused on either speed (Gear 2) or raw power (Gear 3). Gear 4: Boundman was the first to combine with muscle inflation, allowing Luffy to effectively "bounce" off the air to fly and compress his limbs like springs for devastating force. Gomu Gomu no Mi/Gear 4 Techniques | One Piece Wiki

: The first version revealed, focusing on a balance of speed, defense, and power. Debut : Chapter 784 / Episode 726.