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) Don Ho Special Musical Guest (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)