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)
Don Ho
as Special Musical Guest #1 (voice)
