Frank Welker

as Scooby-Doo / Fred (voice)

Casey Kasem

as Shaggy (voice)

Heather North

as Daphne (voice)

Nicole Jaffe

as Velma (voice)

Jane Wiedlin

as Dusk (voice)

Jennifer Hale

as Thorn / Queen (voice)

Jeff Bennett

as Jasper Ridgeway / Jack / Lifeguard #1 (voice)

Kimberly Brooks

as Luna (voice)

Tom Kenny

as Harry / Stormy Weathers / Barry / Lightning Strikes / Lifeguard #2 (voice)

Phil LaMarr

as Daniel Illiwara / King (voice)

Michael Neill

as Russell / Dark Skull / Matt Marvelous (voice)

Kevin Michael Richardson

as Malcolm Illiwara / Yowie Yahoo / Crocodile (voice)