Super Mario World Remix
I've only listened to the first two tracks, but so far this seriously rocks!
He, he! I downloaded all the audio files, and the old SMW songs was replaced with new techno and a bit of rock Mario songs!
Cool songs! Koopas castle audio file was a bit of rock.
That stuff is pretty good. I have heard some other SMB remixes and everything but these I bet are the best ones.