Mr. Satan known as Hercule in some of Funimation's dub and in Viz's English manga, is a flamboyant martial artist that becomes a world renowned hero after the Cell Games. After Goku and his companions stop attending the Tenka'ichi Budōkai, Mr. Satan starts winning them and becomes the reigning champion for many years. During the Cell Games, he attempts to fight Cell, but even after being swatted away, he is given credit for Cell's death by the media. He is soon called a world hero, gaining great wealth and a city named after him. Though Goku and his companions find his inflated ego and arrogance very annoying, he becomes their trusted friend after befriending the good Majin Boo, helping defeat evil Boo by using his appeal to get energy from all of the individuals on Earth for the Genki-Dama, and his daughter Videl pairs up with Gohan.
In their initial dub of the series, Funimation changed his name to "Hercule". However, when they recorded a new dub for uncut home video releases, they switched to using the original Mr. Satan. In 2009, Toriyama revealed his real name to be Mark (マーク Māku?), a pun on the Japanese word akuma, which means devil or demon. He was voiced by Daisuke Gōri in Japan until his death, with Unshou Ishizuka taking over the role afterward, while in English he is voiced by Don Brown in the Ocean dub, and Chris Rager in the Funimation dub.