The Mystery Gang goes to Hawaii for the Big Kahuna of Hanahuna Surfing Contest. However, the gang and the locals find the island invaded by the vengeful Wiki Tiki spirit and his demons.
Shaggy Rogers (voice)
Casey Kasem
Scooby-Doo / Fred Jones / Wiki-Tiki / Interviewer (voice)
Frank Welker
Velma Dinkley (voice)
Mindy Cohn
Daphne Blake / Auntie Mahina / Local Woman #2 (voice)
Grey DeLisle
Little Jim (voice)
Ray Bumatai
Snookie / Local Woman #1 (voice)
Tia Carrere
Mayor Molly Quinn (voice)
Teri Garr
Manu Tuiama / Mainland Surfer (voice)
Mario López
Jared Moon (voice)
Adam West
Special Musical Guest (voice)
Don Ho
Special Musical Guest #2 (voice)
Dick Dale
Special Musical Guest #1 (voice)
Don Ho
Tiny Tiki / Surfer on Bike / California Surfer Dude / Local Guy #1 / Wild Pig / Gecko / Flame Thrower (voice)
Dee Bradley Baker
Ruben Laluna / California Surfer / Tiny Tiki (voice)
Tom Kenny