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
Be Cool, Scooby-Doo! version." However, he denied it as "a campy or meta version" of "Scooby-Doo". This marks the first "Scooby-Doo" television series not to feature Casey Kasem in any capacity; Kasem, who voiced Shaggy from 1969 to 2009, retired from voice acting due to declining health during the production of "Mystery Incorporated" and died on June 15, 2014. Kasem's death leaves Frank Welker as the only remaining original cast member still with the franchise. It is also the first series since "A Pup Named Scooby-Doo" where Velma is voiced by an actress other than Mindy Cohn. "Be Cool, Scooby-Doo!" made its global