In conclusion, Luffy developed Gear 3 during the Water 7 Arc, specifically during his battle against Rob Lucci. This powerful technique marked a significant turning point in the story of One Piece, showcasing Luffy's growth and development as a fighter.
Unlike Gear 2, which speeds up blood flow, Gear 3 involves Luffy biting into his thumb and blowing air directly into his bones. Because his bones are made of rubber, they expand to massive proportions. when did luffy get gear 3