Alpha (voice)
Snap (voice)
Additional Voice (voice)
Zim (voice)
Gormal MacGuffin (voice)
Himself
Orange Haired Elf (voice)
Grey Matter
Book Store Autoraph Hound
Bob Zaiderman
Billy / Harold / Pumpkin / Trick-or-Treater Eater
Billy/Harold
Grey Matter / Stinkfly Prisoner
Billy / Billy's Dad (voice)
Billy / Billy's Dad (voice)
Billy / Billybot / Harold / Pale Ghoulish Juror / Chippy the Squirrel (voice) (as Richard Horvitz)
Billy (voice) (as Richard Horvitz)
Otis (voice)
Billy/Guy (voice)
Scooper (voice) (uncredited)
Puppy in Barn (voice)
Additional Voices (voice) (uncredited)
Cheddar (voice)
Stonehenge (voice)
Additional Voices (voice)
Alpha 5 (voice)
Alpha 5 (voice)
Daggett Beaver
Young Energizer
Alan Eakian
Daggett Doofus Beaver (voice)
