Decent sprite movie
It wasn't too bad. I'm not a huge fan of sprite, so I may not be the best person to review this :P
I liked the fact that you gave the choice of a few endings. Not having to watch it all again to see a different ending is also a big plus. The sprite work seemed pretty good for the most part, as well. As was said, you seemed to capture the attitude of the characters as well.
However, the background seemed a bit odd. Also, Naruto's ending dragged out with the powering up bit. As was mentioned, the text can be very hard to read when smaller. You might want to consider a different font in the future.
Overall, it's decent, but a few odd things here and there made it hard to really enjoy it.