[2][3] Jimmy is able to speak coherently, and his various aspirations on several different levels of journalism over time also sometimes even makes him more articulate than any of the other children, though his speech is largely affected by his stuttering, and sometimes also his tendency to end some of his sentences with "...very much".

Despite his disability, he is also shown to be an extremely accomplished drummer, performing with Stan Marsh's death metal group Crimson Dawn in the episode "Band in China".

[4] Jimmy first appears in the season five (2001) episode "Cripple Fight", in which he moves to South Park from a neighboring town and antagonizes Timmy.

[2] Parker and Stone initially intended for this to be Jimmy's only appearance, but decided to include the character in subsequent episodes.

Melanie McFarland of the Seattle Post-Intelligencer describes Jimmy and Timmy's capabilities and portrayal in the show as Parker and Stone declaring their opposition to political correctness as social restriction.