"

 Bowser 

I replaced the New SMB image with the Mario & Luigi image because this version of Bowser had more reception than any version of him in the history of the series. I put it there because it depicts him in a game where he is arguably the main character of the game, not because it's the most recent image. We do not have a ""most recent appearance"" rule because it makes an article unstable, and suggests that we use an image JUST because it's newer, not because it's better. -  used Ruler! Now, he can figure out the length of things easily. "