Friend of mine gave me this postcard when my visit to UK ....sometimes in Year 2002 (hope that I'm not mistaken).
In the movie, Mystery Inc. consisting of Scooby-Doo (voiced by Neil Fanning), Shaggy (played by Matthew Lillard), Fred (played by Freddie Prinze, Jr.), Velma (played by Linda Cardellini), and Daphne (played by Sarah Michelle Gellar), splits up following a major argument, leaving Scooby and Shaggy to continue as Mystery Inc. and to take care of the Mystery Machine.
The gang are reunited as each is individually invited to Spooky Island, a "frightfully" popular theme park owned by Emile Mondavarious (played by Rowan Atkinson). Once on the island, Mondavarious tells the gang that students are mysteriously becoming mindless zombies and only utter pop phrases. And the story ...continue.