Scooby-Doo on Zombie Island sequences of interplay between Shaggy and Scooby for him. After Don Messick's death, Scott Innes replaced Messick as the voice of Scooby-Doo. Casey Kasem did not reprise his role as Shaggy Rogers as he wished to only voice Shaggy if the character became a vegetarian, like himself. Instead, Billy West provided the voice for Shaggy. Mary Kay Bergman was cast as Daphne when the character was taken in a new direction. B.J. Ward, who played Velma in the "Johnny Bravo" crossover episode, reprised her role in this film. Frank Welker is the only actor from the original series to reprise
Shaggy & Scooby-Doo Get a Clue! movies, to be replaced with new digitally-recorded thunderclaps. In episode 8, there is one scene where actual footage from a few of the Scooby-Doo direct-to-video movies is used. Shaggy even converses about the events in that movie. Episodes from the first two volumes were re-released on multiple Scooby-Doo DVDs in 2010. Both seasons are available on the iTunes Store and Amazon Video. On September 27, 2018, both seasons were made available for streaming on Boomerang's SVOD subscription service. Shaggy & Scooby-Doo Get a Clue! Shaggy & Scooby-Doo Get a Clue! is an American animated comedy series produced by Warner Bros.