How Do The Monsters Do It? is the forty-fifth episode of Scooby Doo Sparks. It is loosely based on the story from the third issue of Scooby-Doo! Team-Up, Two Mites Make It Wrong and thus features Batman and Robin. The plot was modified to focus on Mystery, Inc. finding out who is selling costumes to the criminals they catch because it was thought that Bat-Mite and Scooby-Mite were a waste of time.
As of the end of the previous episode, Mystery, Inc. is now an independent mystery-solving organization again. However, its members have had a thought come into their head. How did those crooks they exposed get the disguises they used? They decide to investigate that. The trail ends up leading to Gotham City where Batman and Robin offer their assistance. The trail leads to the Spook and False-Face, but can they catch them before they get away?