When a horrible robot dog attacks the town, suspicion points to Scooby and the sheriff has him locked up. Now it's up to the gang to clear Scooby's good name. But standing in their way is a new enemy they haven't counted on: a diabolical parrot named Professor Pericles who knows more about Mystery Inc than he should. Add to this the growing friction between Shaggy, Velma and Scooby, and you have a recipe for disaster. Show less