Demon Gaoh

Demon Gaoh is the final boss of Samurai Shodown VI/Samurai Spirits Tenkaichi Kenkakuden. He appears as a demonic form of Gaoh Kyougoku Hinowanokami, who is said to have successfully tamed the Dark Emperor, using it's power to take over Makai so as to stop the demons from invading our world, but becoming himself a demon in the process. This form, however, does not exist canonically, since Samurai Shodown VI is only a party title and thus not canon.