Scooby-Dum is Scooby-Doo's cousin. Dum lives with Ma and Pa Skillett in the Hokeyfenokee Swamp of southern Georgia.[1] Whenever Doo and Dum greet each other, Scooby-Doo greets, "Scooby-Dum" and Scooby-Dum says, "Scooby, doobie, doo." They then do a special handshake involving two high fives. Whenever he heard the word "Clue", he would invariably pull out a magnifying glass and, intoning the opening four notes of Beethoven's Fifth Symphony, chant "Dum, dum, dum, DUM!"
Scooby-Dum was also a member of the Scooby Doobies on Laff-a-Lympics.