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)