The Flash is a popular superhero with the power to animate things, most notably cartoons by the Brothers Mouse. He's defeated all his enemies by things like stopping their frame rate, changing their file extension to an unusable one, or just glitching them up with a bad ActionScript command of FURY. The Cheat teams up with him occasionally to amaze his friends because he can make a drawing move.
The Flash was originally published by Macromedia Comics, to great reviews and sales. A few years after the Flash's creation, Adobe acquired Macromedia Entertainment for an undisclosed sum, causing the Flash to be transferred, however, the Brothers Mouse most likely don't know this, because they lost interest in the Flash after the fifth release.