Spencer Klein
Arnold (voice)
Francesca Marie Smith
Helga Geraldine Pataki (voice)
Jamil Walker Smith
Gerald Johanssen / Rasta Guy (voice)
Dan Castellaneta
Grandpa 'Steely' Phil / Nick Vermicelli (voice)
Tress MacNeille
Grandma Gertie 'Pookie' / Mayor Dixie / Red (voice)
Paul Sorvino
Scheck (voice)
Jennifer Jason Leigh
Bridget (voice)
Christopher Lloyd
Coroner (voice)
Vincent Schiavelli
Mr. Bailey (voice)
Maurice LaMarche
Big Bob Pataki / Head of Security (voice)
Kath Soucie
Miriam Pataki / Mona / Reporter (voice)
Christopher Walberg
Stinky Petersen (voice)
Sam Gifaldi
Sid (voice)
Justin Shenkarow
Harold Berman (voice)
Blake McIver Ewing
Eugene Horowitz (voice)
Olivia Hack
Rhonda Wellington Lloyd (voice)
Anndi McAfee
Phoebe Heyerdahl (voice)
James Keane
Marty Green / Riot Cop (voice)
Elizabeth Ashley
Mrs. Vitello (voice)
Michael Levin
Ray Doppel (voice)
Steve Viksten
Oskar Kokoshka (voice)
Dom Irrera
Ernie Potts (voice)
Baoan Coleman
Mr. Hyunh (voice)
Craig Bartlett
Monkeyman (voice)