No Rules Man (a.k.a. No Rules Guy) is a character that appeared in "House Rules". He also serves as the main antagonist of that episode.
No Rules Man came up to Mordecai and Rigby after Rigby yelled that he didn't want any more rules. He then is shown that he plays video games. After the Unicorns from "The Unicorns Have Got to Go" (most likely because they don't want any other trouble from the unicorns), Mordecai tells the No Rules Man to get rid of the Unicorns. . At the end of the episode, No Rules Man is playing Karate Choppers and exploding, resulting in his death. In "Exit 9B", He is seen water from a cup onto Skip's Fists of Justice, causing them to malfunction and having Skips throwing them out upon exploding. HHe is killed again then sent to portal.
- He is similar to Leon from the episode "Benson Be Gone".
- He is possibly the founder of the Land of No Rules, though it is unconfirmed.
- He resembles Snake Pliskin from the movies Escape From New York and its sequel, Escape From L.A.
- He appears in "Exit 9B" where he is one of the enemies. He does not appear from the start with the others but does later while the fight is going on.
- He is credited as "Mystery Guy" both in "House Rules" and in "Exit 9B".