....
First off- the disclaimer at the beginning is lame. Sonic and DBZ do indeed share many similarities, but some random dude blowing up a city with a single one-handed energy blast is SO blatantly DBZ. I wouldn't have minded so much, but you actually used DBZ sound effects, which are totally lame and overused. And disclaimers are stupid... period.
Secondly, even though I am aware that Sonic isn't known for its ingenious plot diversity (some new evil force comes up, steals chaos emeralds, threatens to destroy the world, and the gang has to stop it), you obviously took scenes and lines directly from Sonic games. (Knuckles' monolouge, exactly like it was from SA without Chaos, just of some other evil guy, and Tails and Knuckles meeting up with Sonic exactly like in Sonic Heroes, sin plane.)
The drawings were poor (even the ones you traced, cheater) and the animation was blocky and static.
I'll give you credit for effort though. But overall it sucked. Hopefully next time I won't close the window halfway through out of agony.