The Devil (known by many names) is the supreme and demonic master of Hell, who is a minor villain in the episode "Stinkmeaner Strikes Back".
After Robert Freeman killed Colonel H. Stinkmeaner, the latter's soul was damned in Hell. However Stinkmeaner had a lot of fun in the underworld, as he learned martial arts and beat down an entire legion of demons. Stinkmeaner even had the gall to call the Devil himself a "bitch-ass nigga".
The Devil was so impressed by Stinkmeaner's new fighting skills that he rewarded him with a trip back to Earth, so that he could have his revenge on the Freeman family, "and spread ignorance and chaos in the black community".