The gang from Mystery, Inc. can't wait to visit Fowler's Fun House! It's the first store to carry Calico Carly, the hot new toy sensation. But then a huge come-to-life Carly runs riot through the store and scares away all the customers. Now it's up to Scooby, Shaggy, Fred, Daphne, and Velma to catch the counterfeit Carly -- and put the fun back in the fun house!.