Here's a better look at the Little Big Planet Sonic themed costume pack. They're buy-able add-ons for the game which make your sack-boy look like the Sonic characters seen at left. Since it's LBP...the characters are all re-styled to fit that style, with the button eyes, zipper, and large lower-face area. The Eggman body seems to be the Egg-o-matic. People had already been making Sonic-like levels and items in the user-content creation & sharing part of the game (you can even see videos of that in the Video Entertainment area of SonicGear)