Ready for a whopper of a review?
Only two things bugged me about the whole animation.
1.) The Sonic animation in the beginning (Where it shows Sonic and Gorilla back-to-back with a vs. between them) is terribly done, and comes off as looking like a retarded Crash Bandicoot/Sonic hybrid. This is especially bothersome, considering that the rest of the characters seen in the flash (including the myriad of Sonic's other poses/moves) are much better. So if there's any way to edit and replace that one Sonic pose animation, you really should do that, especially since it is the first time we see Sonic in the flash. Quite likely, there are going to be viewers who quit out of the flash the moment they see Sonic, and then subsequently complain about your terrible drawing of Sonic, while voting below the Blam threshold.
2.) There's a rather noticable lack of movement in the entire flash. I'm guessing that you're parodying a music video of some sort, but I've never seen it, so I can't compare. Nevertheless, the pacing of the video, as well as the lack of definitive action, undermines the true nature behind the spiky hedgehog, not unlike a recent game for the PS3 (o snap i went thar).
Other than that, I like it.
4/5.