This is an evil clone of NutWall. The story behind its introduction is weird. When NutWall got a mirror, AWK looked at it and saw AGK. This was when AGK met the Eyeball. However, the Eyeball did something different to AWK, by giving him a nightmare. The dream makes no sense at all, but at the end AWK's head is blown off. At this time he wasn't even explained. He was later seen sitting on a chair.
He interrupted AWK's Icecream Man nightmare by putting them both in a hellish landscape. A dead body of AGK was there. Oddly, Satanic Infinite Illuminati was there in the dream. Mr. Nightmare stopped smiling when he saw him.