stunning IQ and a pag-ibig for science. Usually, his intentions cause madami 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 mga kaibigan 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 telebisyon 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 with llamas. Carl...