I was quite impressed by this if only because of how accurate it was. It wouldn't be years later until Sonic really did come into the series! Yep, that happened! There wasn't a story like this, I don't think. I still like the animation. It was weird to see Sonic's blue hair.
It reminded me of the Super Saiyan God form. The Super Sonic itself was like a Super Saiyan. I guess they ripped each other off. The music was great too. Sephiroth has yet to appear, though.