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.
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A Pup Named Scooby-Doo
He wanted to buy the home of the Johnsons and use the land for a fast-food place. 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 be framed.
- A Pup Named Scooby-Doo
Hanna-Barbera Presents: 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.