Kinkotsuman

Kinkotsuman (キン骨(こつ)マン, Kinkotsuman) is one of the first antagonists that appear in Kinnikuman. In the manga, he plays a minimal role, but in the anime, he becomes a recurring antagonist (for comedic purposes). He is usually seen with his accomplice Iwao. He also has a son called Bone Cold. His name is changed to Skullduggery in Ultimate Muscle.