Board Thread:New on The Amazing World of Gumball Wiki/@comment-4686843-20130927234920/@comment-9300845-20130928000322

That's from The Virus.

http://theamazingworldofgumball.wikia.com/wiki/The_Virus/Gallery


 * looks at pic closely* Oh. The background is real, but somebody has drawn the characters on it. So it's fake...kinda.

Original image.