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.
Chapter 837 (vs. Charlotte Cracker)
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
Gear 4 Luffy is a testament to the incredible abilities of Monkey D. Luffy, showcasing his growth and potential as a pirate. With its enhanced physical strength, speed, and durability, Gear 4 has cemented its place as one of the most iconic and powerful transformations in the One Piece universe. As the series continues to unfold, it will be exciting to see Luffy continue to evolve and push the boundaries of his abilities.
Chapter 895 (vs. Charlotte Katakuri)
Despite its power, Gear 4 has a significant weakness: it consumes a lot of Luffy's stamina. If Luffy stays in this form for too long, he can become exhausted, leaving him vulnerable.
Leaner, slimmer upper body with longer, thinner arms. The steam pattern is more angular. Legs remain normal size. Luffy inflates his belly to an enormous, globular
Gear 4 marks Luffy’s transition from a “promising rookie” to a “legitimate top-tier fighter.”
Massively swollen upper body, disproportionately small legs, and a spherical torso. Steam emanates from his body, reminiscent of Gear 2. Charlotte Cracker) Gear 4 is a powerful transformation
Gear Fourth (Gear 4) is a transformative technique developed by Monkey D. Luffy following his two-year training under the legendary Silvers Rayleigh on Rusukaina Island. It represents a paradigm shift from his previous Gears (2nd and 3rd), combining immense physical power, advanced Haki application, and creative bodily inflation. Unlike earlier Gears that simply enhanced speed or limb size, Gear 4 fundamentally alters Luffy’s combat physiology by infusing his muscles with compressed air and coating them with Busoshoku (Armament) Haki. This report analyzes the mechanics, primary forms (Boundman, Tankman, Snakeman), weaknesses, and the technique’s role in Luffy’s journey toward becoming an Emperor of the Sea.