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)