On screen
Cast
15 credited performers
Artwork unavailable
Lane Toran
Arnold (voice)
Francesca Marie Smith
Helga Pataki (voice)
Jamil Walker Smith
Gerald Johanssen (voice)
Tress MacNeille
Grandma Gertrude (voice)
Dan Castellaneta
Grandpa Phil (voice)
Maurice LaMarche
Big Bob Pataki (voice)
Kath Soucie
Miriam Pataki (voice)
Olivia Hack
Rhonda Wellington Lloyd (voice)
Artwork unavailable
Christopher Walberg
Stinky Peterson (voice)
Anndi McAfee
Phoebe Heyerdahl (voice)
Baoan Coleman
Mr. Hyunh (voice)
Hiep Thi Le
Mai (voice)
Vincent Schiavelli
Mr. Bailey (voice)
Dom Irrera
Ernie Potts (voice)
Artwork unavailable
Steve Viksten
Oskar Kokoshka (voice)