Your pet might not be a large great Dane, but he can still be a part of the Scooby gang. Dress him in the Scooby-Doo Mystery Machine Pet Costume. It features the blue and green van driven by Fred in the animated series and movies. It is accented with orange flowers and even has an image of Fred, Velma, Daphne, Shaggy and Scooby inside the cab. Like any good dog, Scooby has his head out the window.