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
Scooby-Doo! and the Witch's Ghost features real ghosts instead of traditional crooks in masks, giving the film a darker tone. The film has been adapted into a book. It is the second of the first four Scooby Doo direct-to-video film to be animated overseas by Japanese animation studio Mook Animation. The film marks the first time voice actor and radio-personality Scott Innes voiced Shaggy, as Billy West (who voiced Shaggy in "Scooby-Doo on Zombie Island") needed time for his roles as Philip J. Fry, Professor Farnsworth and Dr. John Zoidberg on "Futurama". After Ben Ravencroft, a famous horror writer of whom Velma Dinkley is a