AkuAku, from the Crash Bandicoot series. He acts like a protector and a fatherly-figure to Crash, Coco and Crunch. This picture shows his old-school appearance, but he looks different in CotT and Mind over Mutant.
Note: Larger shots of each poster after the jump, high-res versions available at the artist's site. This is a small series of Super Mario propaganda posters from Bowser's camp encouraging Mushroom Kingdomites to join his reptilian republic against his.