Jet Fusion: a secret agent aided by Jimmy in the fight against Professor Calamitous and his daughter Beautiful Gorgeous. He is first seen in the episode "Operation: Rescue Jet Fusion" he is voiced by actor Christian Slater.
Butch Pakovski: Butch is the slightly slack-jawed, unintelligent bully of Lindbergh Elementary School who doesn't have many friends at all (except his younger brother-name unknown). He is mostly seen bullying Oleander and Carl. He is voiced by Rob Paulsen.
Brittany: Brittany is in Jimmy's class. She can dance well, as she is seen dancing with Cindy and Libby...
stunning IQ and a love for science. Usually, his intentions cause more harm than benefit for the city of Retroville, but that never stops him from trying. Most of the time, he's busy saving the city from his own experiments gone wrong. He is best friends with Carl and Sheen. His middle name is named after Isaac Newton, the famous physicist. In the movie, Jimmy wore blue shorts and brown shoes. In the television show, he wears blue jeans and gray Converse sneakers.
Carlton Ulysses "Carl" Wheezer (Jack McHugh) is Jimmy's shy, asthmatic best friend who has an unhealthy obsession...