Mr. O'Greazy is a fast-food restaurant developer.
Mr. O'Greazy is an obese, middle-aged Caucasian male, who has lost the hair off the top of his head, while the rest of it is brown. He has flies swarming around his head.
He takes his business involving fast food very seriously. He's not concerned with flies buzzing around him for obvious reasons. He's also shown to be very adamant about how he gets business taken care of, whether it makes him a suspect, or not.
A Pup Named Scooby-Doo
He wanted to buy the home of the Johnsons and use the land for another O'Greazy fast-food restaurant in Coolsville, one that would perhaps be easier for people to get to in the city. Because of this, he was a possible suspect to be behind the BooBeard haunting, but was found innocent when BooBeard was unmasked as Jack. It was also noted, according to Velma, that BooBeard put O'Greazy's buckets at the scene they were found for O'Greazy to be framed.
He hired Grady Laurence to perform in his new Bucket O' Nachos commercial but later fired him due to secretly wanting a better actor. He later rehired him to star in a new commercial; this time, it was a new Bucket O' Scooby Snax commercial.
- A Pup Named Scooby-Doo
When he heard about Shaggy Rogers and Scooby-Doo's refusal to eat at Pizza Barn after a monster threatened them not to enter its annual pizza-eating contest, O'Greazy tried to tempt them into buying his Bucket O' Pizza, but the pizza was uncooked.
- In The Pizza Delivery from Beyond!, his first name was revealed to be Al.