They did manage to capture Sonic and Porker Lewis, and tied them to the roller coaster. When Robotnik learned through his spy network that Sonic the Hedgehog planned to make a raid on the Zone, he ordered the Marxio Brothers to make sure Sonic failed. Chicio rigged all of the games in the zone to be unwinnable and they used a massive statue of Robotnik to hypnotise Mobians into becoming compulsive gamblers. In their first appearance, they were in charge of the Casino Night Zone for Robotnik. Ruled by Robotnik įrom left to right: Chicio, Grouchio, and Harpio. It is implied that they were brought out of this world to Mobius by Doctor Robotnik, after which they worked to run his 'commercial ventures'. The Marxio Brothers were three electricians who came from ' Super Marxio World', a place they are terrified of (most likely poking fun at the 'horror' of being in a Mario or Nintendo game and not a Sonic universe). The Marxio Brothers debuted in 1994, at a time when Sega and Nintendo were major rivals in the video game industry.

Some of the publication's earliest parody characters, they are based partly on the stage personas of Groucho Marx, Chico Marx, and Harpo Marx respectively of the early 20th century comedian group known as the Marx Brothers, and partly on the video game icons of Super Mario Bros. The Marxio Brothers were created by Nigel Kitching and Richard Elson.

Casino night zone fanart