The greatest bad guy in the Mario Series, bar none.
In Super Paper Mario, a game I have not yet had the pleasure of playing, Luigi is brainwashed by the bad guy and he becomes the sinister Mr. L.
Done under the recommendation that I draw more Mario stuff. Also got to try a little with multiple sources of light and colored light. I think he turned out quite well.
Now, I shouldn't have to say this, but Mr. L is property of Nintendo.