The gang want to check out the new store at the mall, Dr. Yuckenstein's Make-a-Monster; but when a mega-sized monster comes to life and scares away all the customers, it's a monster of a mystery that only Scooby-Doo can solve.
Scooby-Doo and his friends from Mystery, Inc. try to track down an angry Viking before he can ruin the new Viking Village at Happy Sally Land theme park.
When the Mystery Machine gets a flat tire, the only place to stop is a creepy old castle. The man who owns the castle is having a dinner party and invites the gang, but an unexpected visitor shows up-- a ghost!.