Casey Kasem
Shaggy Rogers (voice)
Frank Welker
Scooby-Doo / Fred Jones / Wiki-Tiki / Interviewer (voice)
Mindy Cohn
Velma Dinkley (voice)
Grey DeLisle
Daphne Blake / Auntie Mahina / Local Woman #2 (voice)
Ray Bumatai
Little Jim (voice)
Tia Carrere
Snookie / Local Woman #1 (voice)
Teri Garr
Mayor Molly Quinn (voice)
Mario López
Manu Tuiama / Mainland Surfer (voice)
Adam West
Jared Moon (voice)
Dick Dale
Special Musical Guest #2 (voice)
Don Ho
Special Musical Guest #1 (voice)
Dee Bradley Baker
Tiny Tiki / Surfer on Bike / California Surfer Dude / Local Guy #1 / Wild Pig / Gecko / Flame Thrower (voice)
Tom Kenny
Ruben Laluna / California Surfer / Tiny Tiki (voice)