He was the only one I saw credited at the end of the game (NA version)...I was quite stunned when I saw it. There was a credit for "Artwork" and then "Title Art," the rest were mainly programming and production credits. I checked that link, and then beat the game again, just to double check, and the people N-Sider lists under "Graphic Design" were credited under "Object Design" in the game...not sure what that refers to