Ron gets the be part of the cast of Scooby-Doo for a episode. Of course, since he haven't really watch Scooby-Doo, he encounters the typical but scary and weird stuff that a no-watcher Scooby-Doo person gets freaked about.

"Yes, a plan. There is someone who can help us find Potter. They are in America. His name," Voldemort says quietly, his hands folded in front of him, "is Scooby-Doo." H/G, Hr/R, NT/RL, LL/NL, FJ/DB

Scooby and the gang hear about some weird things happening in London, England. They leave to meet up with Velma's uncle and meet Hagrid, who helps them learn more about the mysterious happenings.