Techniques Monkey D Luffy is Busoshoku: Koka, Atama Buso, Gear Second Buso.
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| Busoshoku: Koka |
Busoshoku: Koka (武装色 硬化 Busō-shoku: Kōka, literally meaning: "Color of Armaments: Hardening"): Luffy uses Busoshoku Haki to harden his body (or parts of it). It was used for the first time against the Kraken in conjunction with Gear Third to harden his enlarged arm to the point of it attaining a completely dark and shiny appearance, in order to use his Gomu Gomu no Elephant Gun. In the FUNimation subs, it is called Armament; Hardening.
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| Atama Buso |
Atama Buso (頭武装 Atama Busō, literally meaning "Head Armament"): Luffy imbues his forehead with Busoshoku Haki to harden it. This is first used in preparation for a Gomu Gomu no Kane against the Iron Shell Squadron. In the FUNimation subs, it is called Head; Hardening.
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| Gear Second Buso |
Gear Second Buso (ギア２（セカンド）武装 Gia Sekando Busō, literally meaning "Gear Second Armament"): Luffy imbues his fist with Busoshoku Haki while under the effect of Gear Second to harden it, which also seems to have the added effect of igniting it. It was first used in preparation for Gomu Gomu no Red Hawk against Hody Jones.
