Lava Demon

Lava Demon, known as Lava Devil (ラバデビル) in Japan, is a sub-boss in Mega Man ZX found in Area K. It’s a model of Devil, but unlike its predecessors 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.

Trivia

 * The English Mega Man ZX database says that it is a Mechaniloid, while the Japanese database says it is a Reploid.
 * The Lava Demon appeared alongside other Devil Robots in Archie Comics Mega Man #55's Short Circuits page.