Nicole Jaffe

as Velma Dinkley (voice) (archive footage)

Casey Kasem

as Norville 'Shaggy' Rogers / Robin (voice) (archive footage)

Don Messick

as Scooby-Doo / Professor Flakey (voice) (archive footage)

Heather North

as Daphne Blake (voice) (archive footage)

Frank Welker

as Fred Jones (voice) (archive footage)

Olan Soule

as Batman (voice) (archive footage)

Ted Knight

as The Penguin / Troll (voice) (archive footage)