| Person | Type | Job | Role(s) |
|---|---|---|---|
 Casey Kasem | Cast | Actor | Shaggy Rogers (voice) (archive footage) |
 Daran Norris | Cast | Actor | Ugo DiRinaldi / Shopkeeper / Zombie (voice) (archive footage) |
 Dee Bradley Baker | Cast | Actor | Crusty McPeet / Keeper (voice) (archive footage) |
 Frank Welker | Cast | Actor | Scooby-Doo / Fred Jones (voice) (archive footage) |
 Grey DeLisle | Cast | Actress | Daphne Blake / Dempsey (voice) (archive footage) |
 Kevin McDonald | Cast | Actor | Julian Libris (voice) (archive footage) |
 Mark Hamill | Cast | Actor | Emperor Caesar Saladicus (voice) (archive footage) |
 Maurice LaMarche | Cast | Actor | Additional Voices (voice) (archive footage) |
 Mindy Cohn | Cast | Actress | Velma Dinkley (voice) (archive footage) |
 Nika Futterman | Cast | Actress | Rutie Banez (voice) (archive footage) |
 Pat Fraley | Cast | Actor | Uncle Karl (voice) (archive footage) |
 Ryan Sheckler | Cast | Actor | Ryan Sheckler (voice) (archive footage) |
 Tara Strong | Cast | Actress | Alexandra Viggi (voice) (archive footage) |
| Person | Type | Job | Role(s) |
