Very well done.
Heh, silly Boos, didn't know their own spell's strength.
It's been a while since I last got to see the Power Star movies, and you did a great job with the final one. It was definetly a sad story from the start, but the ending was a great resolve, and showed the only glimmer of hope, even though it didn't seem to exist. Now for my review:
Animation: 10. Very good animation, expanding the limitations of sprites.
Plot: 10. It flowed greatly with the previous movies and ended on a better tone.
Sound: 10. Went perfectly with the movie, and emphasized the sadness, as well as the hope in the end.
Violence: 10. It seemed a little overdone, but it went with the idea of the final, deadly battle well.
Overall: 10. This rating is self-explanitory.
It's too bad you don't have plans to make another sprite movie. Good luck with any future projects you may have!