Good Start
I think this shows that you have a lot of skill with sprite animation, i though it was lacking in backgrounds though (ie MetaKnight Scene). If you added better backgrounds and made it longer, this could be a really original, really good sprite movie.
And to factcat13. Why don't YOU try animating you moron. It's a lot harder than it's cracked up to be. Bet you couldn't do something half as good as this.