Scooby-Doo and Guess Who? - Season 1 Episode 12 -

In famous Hollywood, Shaggy and Scooby take the gang to meet their good friend, Kenan Thompson, who is preparing to broadcast his very own telethon for the first time in history. But when a Ghost Clown attacks, Mystery Inc. must help Thompson save the telethon before all the many characters Kenan has created will never see the light of day.