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)