Mario's Dad / Giuseppe (voice)

Self - Narrator (voice) (6 episodes)

Mario / Luigi / Wario / Waluigi (voice) (uncredited) (8 episodes)

Mario (voice) (uncredited)

Mario / Luigi (voice) (8 episodes)

City Councilman

Vocals

David Dixon (1 episode)

Lou

Nicholas' Father

Red-Suited Ghost (voice)

Yellow Bird/Pierre/General/Rasputin's Dog(voice) (uncredited)

Screenplay

Hermsdorf (1 episode)

Arnie

Sal (as Charles Martinez) (1 episode)

(voice)

Assistant Museum Director

Mr. Hernandez

Bo Edmunds (1 episode)

Police Station Reporter #1

Deputy

District Attorney Cobb