God you guys know nothing about South Park! They're both South Park characters.
My initial guess would be that the left is Trey Parker, and the Right is Matt Stone.
For fun I'll guess:
Wayne Houchin is 90% Satan, judging by the hands. Cartman is, Chris Kenner.
EDIT: Wow don't count the second one, I wrote it down, but a minute before I posted, the guy before me wrote it.