Lava Demon, known as Lava Devil (ラバデビル Raba Debiru?) in Japan, is a sub-boss in Mega Man ZX. It appears in the region the player finds Flammole the Moleroid, and it basically is the Mega Man ZX series version of Yellow Devil. Unlike its predecessors, it is more bestial in nature, possessing claws and is bound to the lava when mobile. Like the Rainbow Devil however, it is controlled by a singular head of a mass-produced enemy, this being the case of a Galleon. However, unlike the other Devils, it will regularly lose its protective hide, completely exposing it. Being a fire-born enemy, it is weak against the Thunder element. It's blind, but can detect enemies by their movements. When an enemy is spotted, it can transform into several variations for attacking.