sonic look better
The fps is 24.
When using the motion tween, don't make it to long or it will look slow and crappy, make some short so they can look fast and some blur effect to make it more animated.
It's getting there, things I'd recommend doing is trying to add a little shake to the larger hits, to add more of a dramatic effect, and maybe try and get some really fast fighting going on, since they're in Super form, and they're the fastest things alive!
btw are you an animator as well?
Cool. See my flash of Super Sonic vs Shadow