A Pup Named Scooby-Doo (1988)
S01E04 The Schnook Who Took My Comic Book
Episode Overview
At the Coolsville comic book convention, Scooby and Shaggy discover that an old friend has been keeping the rare #1 issue of Commander Cool just for them. However, their excitement turns to panic when one of Commander Cool's foes shows up, intent on snatching the coveted comic away from them.