Theodore J. 'T.J.' Detweiler (voice)
Spinelli (voice) (as Pamela Segall)
Miss Alordayne Grotkey (voice)
Digger Sam / Guru Kid / Misc. Voices (voice)
(voice)
Principal Peter Prickly (voice)
Vince LaSalle (voice)
Mikey Blumberg (voice)
Gretchen Grundler (voice)
Ashley 'Ashley A' Armbruster (voice)
Bob Spinelli (voice)
Gus Griswald (voice)
Randall Weems / Digger Dave (voice)
Flo Spinelli (voice)
Ashley 'Ashley B' Boulet (voice) (as Francesca Smith)
Coach Kluge (voice)
Miss Muriel P Finster (voice)