Here's the video to prove it:
http://www.gametrailers.com/player/26679.html
He's in towards the beginning of the video, and the very end. If you turn the volume up you can hear him screaming Mario.
http://www.gametrailers.com/player/26679.html
He's in towards the beginning of the video, and the very end. If you turn the volume up you can hear him screaming Mario.