JakeRockz's Movies-Spoof of 'Scooby Doo! Where Are You!' Cast * Po the Panda (Kung Fu Panda) as Scooby Doo * Captain America (The Avengers: Earth's Mightiest Heroes) as Shaggy * Wasp (The Avengers: Earth's Mightiest Heroes) as Daphne * Thor (The Avengers: Earth's Mightiest Heroes) as Fred * Mary (Johnny Test) as Velma