Heat Guts Manga Premiered In: Volume #2 Following Manga Appearances: Volume #3 Activation: When ally and friend Knightman is deleted by the mighty beast Gospel, Rockman falls into a fit of rage and despair. His emotions trigger a new style change: Heat Guts! Special Attributes: As the name implies, Heat Guts packs a whole lot of strength and power. Rockman usually reverts to this style change when he's outmatched physically. Disadvantages: Heat Guts is weak against any water element, as per usual.