Batman is obviously an effective crimefighter, and he just so happens to also be known as the World's Greatest Detective. That makes it all the more baffling then that he once turned to Scooby Doo for assistance! This happened in an animated movie aimed at kids to be fair, but Batman and Robin joining forces with Scooby and the rest of the Mystery Machine gang is a bizarre and confusing sight. And come on, is it really fair to still call the Caped Crusader the "World's Greatest Detective" if he ends up needing to turn to a talking dog for help?
