Robot DeFault / Marf (voice)
Monster Krumholtz (voice)
Gart / Perry / Loudmouth (voice)
Ogo (voice)
J.D. (voice)
Spitfire / Globitha (voice)
Nessie (voice)
Punch Morley (voice)
Mr. Wheelie (voice)
Master Grabmirist (voice)
Hal Worth-a-ton / Uncle Kuffley / Crikey (voice)
Snap Winsome / Lil' Lugnuts (voice) / Snap Winsome (voice)
Arpa / Grandma 10010 (voice)
Lucy (voice)
Crazy Cousin Gizmo (voice)
Lev (voice)
Dame Lady Madame (voice)
Sir Cranklin (voice)
Bob / Scale (voice)
St. Crispy (voice)
Monster's Singing Voice (voice)
Robo Ono (voice)
Vapid Milquetoast (voice)
Bea Holder (voice)
