Absolutely RIVETTING!!!!
Now this is what sonic animations should be, fast paced, action packed, powered up thingamajig!
U utilized everything that comprises of Sonic's ability: Speed. The energy thingie was an extention. it aestheticised the animation, and if u r right (check "About DBZ similarities:" comment section), then go ahead and use as many DBZ qualities as u want. just dont obliterate sonic in the process.
Like i said, this is what sonic animations should be, not those 8 bit/16 bit 2D sprite crap, which i dont consider effort at all. just plain friggin rip offs of other peoples work.
Great work, matey. i wouldnt advise u to make a sequel, because i dont think u could go very far with the idea. but since u made an ending which does in some sense require a "what happens next?" episode, i dont think it would be a drastic problem. but it wouldnt matter also if u could leave it to our imaginations.
Ciao
WM [:{}]