Whoa. Just... whoa.
Now this was impressive! I've seen a couple of suggestions for a SSB game, but I never thought someone would actually do it. For that matter, I never thought they'd include so many of the original features! Excellent sound (even the announcer was pretty good, which was surprising), nice choices of characters and stages, pretty good graphics considering you used sprites, easily understandable gameplay, and excellent idea overall. Wow.
Now, don't get me wrong... it wasn't perfect by any means. For one thing, you should work on the game physics. The characters slide around far too easily on the ground, and there were some glitches with characters falling into the ground itself. (I noticed this on the Mario Bros. 2 stage, where they could go beneath the ground while falling through the waterfall.) Most notable, however, was the tutorial. Simply put, once you began it you had no way of exiting it except by reloading the game. You need to create a way to end that mode.
Overall, though, this was surprisingly good. Work on those few areas of concern, and you'll have an astoundingly strong game. Very nice!