The Sneak

The Sneak is a version of The Cheat from the "Old-Timey" generation on Homestar Runner, which is a series of cartoons set in 1936, complete with variations of modern characters such as "The Homestar Runner", "Sickly Sam" (Strong Sad), Strong Bad, Marzipan, and "Fat Dudley" (Pom Pom).

He even has his own song, even though he hasn't appeared in any animutations yet...