In Kinnikuman (as well as Kinnikuman Nisei), there are two different meanings to the words Akuma Choujin given by Yudetamago. In the broader definition, the Akuma Choujin are a race of Choujin who reside in the Demon Realm (魔界, Makai) (or are their descendants). The race was founded by Satan (サタン Satan), who had done so for the sole reason of obtaining the power of the General Stone (ジェネラル・ストーン General Stone). Furthermore, their history is long, and therefore their long battle against the Seigi Choujin is not limited to just the characters in the Kinnikuman and Nisei.