Quentin Creeply's home is not only where he lives, but also a shop and a workshop.
A Pup Named Scooby-Doo
Mr. Creeply opened this shop after Carol Colossal fired him. He liked making scary and spooky toys.
The gang went to question him, but didn't get much info. After Creeply leaves to answer a phone call, the alien attacks the gang, but they escaped.