To quote Microsoft Paint Adventures Wiki: "Being [nearly] omniscient, he is an extremely skilled manipulator. He also fits into the billiards concept introduced by The Felt, representing the cue ball. His name is an obvious reference to the pool term for pocketing the cue ball. This relates to how Doc Scratch would die in order to bring forth Lord English. It may also play on "Old Scratch," a traditional name for Satan, which relates to his role as "The Devil" in the story of the Ancestors. "Scratch" also means "to erase or eliminate", which reflects English's role as the demon that will destroy the universe. Like his master, Doc Scratch is not his true name, rather, it is merely a pseudonym.
Scratch appears as a humanoid figure in a white and green suit with a white handgun. His head is shaped like a cue ball, though the lack of an outline makes it look less like a ball and more like a hole in space."
This instructable shows how to build my lego rendition of him. He is complete with movable legs, arms, and a swiveling head. He is very accurate looking, and is an all around great thing to build on a rainy day when all you have is a pile of green and white Legos. I see no reason not to build him, so get to it.