Fred / Scooby-Doo (voice)

Velma (voice)

Shaggy (voice)

Daphne (voice)

Demon (voice)

Starchild (voice)

Catman (voice)

Manny Goldman (voice)

Chip McGhoo (voice)

Delilah Domino (voice)

Shandi Strutter (voice)

The Elder (voice)

The Destroyer (voice)

Chikara (voice)

Worker #1 (voice)

Worker #2 (voice)

Announcer (voice)

Spaceman (voice)