Mr. Porterhouse is a butcher.
He has brown skin, wear glasses and a butchers outfit.
A Pup Named Scooby-Doo
Scooby went to his Butcher shop (not knowing he ran away), and gave him a lot of bones, thinking he and Shaggy have something big planned.
He later met up with the gang after he closed down for the day, and told them how Scooby got himself enough bones for a year, after that he left.