Buster McMuttMauler is a dog catcher who is obsessed with the Doos.
He wears a dogcatcher uniform with a hat.
Buster is, in a way, evil. He's shown to dislike dogs, and loves to corner helpless puppies. His favourite targets were dogs with expensive collars so that he can sell the collars for money. He was also willing to murder Scooby to get revenge on the Doo family.
Buster once antagonized a small puppy, which invoked the wrath of Scooby's parents. They chased him into the back of his own truck, where his boss confronted him for stealing expensive dog collars. Buster was then taken to prison. But, he swore revenge, claiming he would come back for the Doos and their collar.
A Pup Named Scooby-Doo
He tried to puppy-nap Scooby-Doo as an act of revenge. He tried to either catch or kill him several times, but, they always backfire. But, he vows to get Scooby even if it takes him forever.