Scooby-Doo on Zombie Island is the first of a series of direct-to-video animated films based upon the Scooby-Doo Saturday morning cartoons. The movie was produced from 1995 to 1998 and was released on September 22, 1998, and it was the first Scooby-Doo movie to be produced by Warner Bros. Animation, though distributed by Hanna-Barbera Cartoons. The Mystery, Inc. gang, which includes Scooby-Doo, Shaggy, Fred, Daphne and Velma, travel to Moonscar Island which is located in the Louisiana bayou. The film was directed by Hiroshi Aoyama, Kazumi Fukushima, and Jim Stenstrum, based on Glenn Leopold’s unfinished Swat Kats episode The Curse of Kataluna, and written by Leopold and Davis Doi. The film and later following two films had a darker tone then the original cartoons. The song It's Terror Time Again, sung by Skycycle, played after Scooby Doo and the others found out that zombies were real. The title track was performed by Third Eye Blind. American actor Billy West provided the voice for Shaggy Rogers in this film, as Casey Kasem refused to take the role as he had previously asked for Shaggy to be a vegeterian but didn't get his wish so Billy West took over. When it came to the production of the next film Scooby-Doo and the Witch's Ghost, Scott Innes, who provided the voice for Scooby in this film and three other, replacing Don Messick after his death, offered to provide Shaggy's voice, therefore Billy West was no longer needed. As Heather North was unable to take the role