Awful.
You should have stuck with sprites. There were so many problems I had with this movie.
1. The battling was TOO FECKING SLOW. Sonic was winded after one 2-mph kick? I think not.
2. The thing was over so soon, that the movie seemed pointless.
3. The "Big assed nuke" at the end had NOTHING to do with a nuclear bomb, and next time you include one in an animation, try to look at the designs.
4. With the "Big assed nuke", after it blew up, sonic was killed with a rock, as mario was knocked over?! BULLSHIT! 1.7 miles of a nuclear blast is instantly incinerated! 5.9 is decimated! This of course is talking about what happened with the FIRST, SMALLEST nuclear bomb!
5. The music did not match the fighting. At all. It was a pretty annoying song to choose for battle music, overall.
6. Where were the sound effects?
7. The rocket launcher came from where, exactly?
8. ^^Same question with the plane.
9. With the rocket launcher, the rocket you drew that came out was all wrong.
10. Another problem with the rocket launcher, why did it home in on that particular plane? It looks like a fiberglass model.
In summary, if you must make the characters realistic, keep the rest of the movie up-to-date as well.