Well here it is, many people requested this ROM including myself, so after no one seemed to know where it came from I decided to go out and find it myself. The ROM is called Mario Forever and It's the ROM played in the now famous video seen here and floating around the web
The ROM has 1-1 through 1-4, but as far as I know this is as complete as it gets for right now.
The game is insanely hard, lets see who can be the first to complete it without cheats or save states.
Download the ROM at the Megaupload link below
Have fun endlessly falling in to pits and eventually losing it like the guy in the video.