Butch Magnus (full name: Butch Magnus Milosevic) is an over-developed 12-year-old boy who is a bully at Riley's school, who appeared in "Shinin'". He has a severe anger problem, bad manners, a complete disregard for authority, and has a tendency to rob others and ask them for their things afterwards. He was sent to a Catholic school, and a military camp via one of the episodes of Maury Povich show in attempts to control him but neither worked. He was voiced by Daryl Sabara who played Juni Cortex in the Spy Kids movies.
Butch has a long history of violent tempers and some mischeivous actions, a blantant disregard for the law, and a tendency to rob others and ask them for their things afterwards, which made everyone grew evidently sick and tired of him. They even called new names "Crazy Butch Magnus" and "One Punch Butch". He was originally sent to a Catholic school called Jesus, Mary and Joseph Academy for boys which he was later expelled from for assaulting a nun there, and a military camp via one of the episodes of the Maury Povich show which did not worked. All these attempts to control him has met with dismal failure. In the episode Shinin', Butch steals Riley's chain, and Riley has to recover it at great difficulty. He first tried to fight him but failed miserably due to being outsized. He then hired Ed Wuncler III to capture him but Ed accidently kidnapped the wrong kid. Later, he hires a member of Thugnificent's crew to attack him but he turns the tables by breaking his leg with a baseball bat. Butch gives the chain back afterward because his father said it was worthless. He appears in two other episodes, "The Red Ball", in which he is hired by Huey to play against the Chinese kickball team. He is injured like everyone else at one point taking a bombardment of shoes thrown by Chinese fans knocking him unconscious. He also appears in "A Date With the Booty Warrior", in which he is among the trouble making students taken to the prison.
Riley has a big hatred for Butch and references him as "Bitch Magnus".