Gear 4 - Luffy

: By compressing his limbs into his own body like springs, Luffy can unleash explosive recoil, turning his arms into "pistons" for devastating force.

Gear 4 is a powerful transformation that Luffy unlocks during his fight against Donquixote Doflamingo. This form allows Luffy to increase his physical strength, speed, and durability to incredible levels. When Luffy activates Gear 4, his body inflates like a balloon, and his muscles grow to enormous sizes. This transformation also enhances his physical abilities, making him a formidable opponent in close combat. gear 4 luffy

The technique consumes Haki rapidly. After the Haki limit is reached (typically a few minutes to tens of minutes depending on the form), Luffy deflates entirely and becomes immobile for approximately 10 minutes, unable to use Haki. : By compressing his limbs into his own

Luffy inflates his belly to an enormous, globular size after eating excessive amounts (in this case, Cracker’s biscuit soldiers). He retracts his limbs entirely. When Luffy activates Gear 4, his body inflates

Massively swollen upper body, disproportionately small legs, and a spherical torso. Steam emanates from his body, reminiscent of Gear 2.

Gear 4 Luffy: The Ultimate Power of the Muscle Balloon Monkey D. Luffy ’s Gear 4 is more than just a power-up; it is the culmination of two years of grueling training on Rusukaina under Silvers Rayleigh. First revealed during the climactic battle against Donquixote Doflamingo in and Chapter 784 , this transformation pushed the limits of Luffy's Gomu Gomu no Mi (the Gum-Gum Fruit) by combining massive muscle inflation with the hardening of Armament Haki. How Gear 4 Works: The Science of "Muscle Balloon"

To transform into Gear 4, Luffy uses his Busoshoku Haki (Conqueror's Haki) and his Gum-Gum Fruit abilities. The transformation involves Luffy's body inflating like a balloon, and his limbs elongating and becoming more muscular.