Next Mystery Inc. thought maybe they could solve mysteries better if they had more than one dog. That introduced Scooby Dum, Scooby's brother. Scooby Dum didn't really act a whole lot like Scooby except for the fact that they are both very clumbsy. Next came more of Scooby's family when Scooby's cousin Scooby Dee steped into the scene. She was a Hollywood dog and to Doo and Dum very pretty. But that wasn't the end of the Scooby family.