"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."
Casey Kasem
as Shaggy Rogers (voice)
Frank Welker
as Scooby-Doo / Fred Jones / Wiki-Tiki / Interviewer (voice)
Mindy Cohn
as Velma Dinkley (voice)
Grey DeLisle
as Daphne Blake / Auntie Mahina / Local Woman #2 (voice)
Ray Bumatai
as Little Jim (voice)
Tia Carrere
as Snookie / Local Woman #1 (voice)
Teri Garr
as Mayor Molly Quinn (voice)
Mario López
as Manu Tuiama / Mainland Surfer (voice)
Adam West
as Jared Moon (voice)
Don Ho
as Special Musical Guest (voice)
Dick Dale
as Special Musical Guest #2 (voice)
as Special Musical Guest #1 (voice)
Dee Bradley Baker
as Tiny Tiki / Surfer on Bike / California Surfer Dude / Local Guy #1 / Wild Pig / Gecko / Flame Thrower (voice)
Tom Kenny
as Ruben Laluna / California Surfer / Tiny Tiki (voice)
Temple Mathews
Writer
Tim Maltby
Director
Kathi Castillo
Character Designer
Tristin Cole
Background Designer
Sander Schwartz
Executive Producer
Collette Sunderman
Casting
Thomas Chase
Original Music Composer
Julie Ann Lau
Editor
Producer
Margaret M. Dean
Joseph Barbera