Its okay...
Needs better animation, I dont understand why the emeralds and the Tornado sometimes have 3D elements, sure its cool 'n all, but why? It was pretty cool, but Ultra Sonic was, not needed. (seelkadoom257 is right about Ultra Sonic though)
And why was there gravity in space!?!?!?!?!?!?!? Knux and Sonic jumped onto the ship and Sonic was going to crash into Earth from there? How the f*** can u fall in sPaCE!!!!!!!!!!! And y did Sonic and Shadow go Super so soon?!
By the way, its all Tails' fualt! He gave them the emralds so he should just BBBUUURRRNNN!!!!!!!!!!!!
Anyway, Novice123, RyanOfFlame, and thephoenixflame are right, I agree with all of them, except u chaos10110, just no.