Pirated Super Mario World

I was looking through the tube again for some funny speed run videos and I found this. Apparantly there was a pirated version of Super Mario World that made it's way over to the NES (wtf? why regress?). The original game was for the SNES, and is considered one of the best games of all time. Check out the video, it seems the pirates actually did a somewhat good job on this copy. I hate pirating, but I have never seen a pirate go to such lengths.