Word Of Advice
You Need To Change Things in your movie if you actually want it to be good. Take this too the heart, cause it can only help.
1. You need fix up your black boxes. you can obviously see little slips of the background.
2. The audio is crap. The music sucked, and there were no sound effects. so just add them.
3. Continuity!!!!!!! Dude, knuckles, or "fuckles" was from advance, meanwhile sonic was from the 3rd game. not to mention, all the really horrific sprites, like the half robotnik robot thing. and tails went from the 3rd game, and then when you made him super, he was from advance. (You should have just used the super tails from sonic 3). Also robotnik at the end was from sonic 1.
4. I liked the text boxes, they were designed very nicely, and the text themselves was sweet. but the words written inside, were utter garbage. write a better script, like one that is funny.
5. There was no plot. knuckles just fucked everything, tails blew up? I'm confused.
6. Your style of animation is weak. it doesn't flow, it's very choppy.
Overall I'm gonna state that, while sprites are fun, and easy, because all you have to do is just cut and paste, and blah blah blah, don't make a sprite movie, unless it looks good, because it makes the rest of us sprite animators look bad, and then everytime someone sees a sprite movie they automatically blam it. and I don't like being blammed just because my movies are a certain genre.
Now, go back into your movie, fix it up, and update it. I'll check back in like a month. so you better make this shit look good, and be damn funny,!