TransformationFirst seen: Episode 726
Gear Fourth
Gear 4th / Fourth Gear
ギア4
Used by Monkey D. Luffy in One Piece
Description
Luffy coats his arm in Busoshoku Haki (Armament Haki) and bites it, inflating his muscles while infusing every fiber with Haki. This creates a massive, muscular form with extraordinary offense and defense. Luffy gains flight capability and his attacks become coated with Haki by default. Developed during his two-year training on Rusukaina island fighting enormous beasts.
Power & Effect
Extreme offense and defense; flight capability; all attacks Haki-coated; three distinct sub-forms
Trivia & Notes
- Three known forms: Bounceman (default), Tankman (endurance), Snakeman (speed)
- Cannot use Gear Fourth indefinitely — Luffy's Haki runs out after a set time
- Developed specifically to defeat the massive animals on Rusukaina island
More Monkey D. Luffy Techniques
Attack
Gomu Gomu no Pistol
Gum-Gum Pistol
Attack
Gomu Gomu no Bazooka
Gum-Gum Bazooka
Attack
Gomu Gomu no Gatling
Gum-Gum Gatling
Transformation
Gear Second
Gear 2nd / Second Gear
Transformation
Gear Third
Gear 3rd / Third Gear
Form
Boundman
Bounceman
Form
Snakeman
Snakeman
Transformation
Gear Fifth
Gear 5th / Sun God Nika
Attack
Gomu Gomu no Red Hawk
Gum-Gum Red Hawk
Attack
Kong Gun
Kong Gun
Technique information is collated from community sources, fan wikis, and the official series.One Piece content is the property of its respective creators and studios.