not bad, not bad at all
your friend sounds quite like sonic, i like that. most of the others don't really sound like him, but Stevehedgehog does. the humor is nic too. i would have put on some sort of animation in some parts, like an animated aura around "shadow".
but those are just minor things. don't pay attention to it if you don't want to. ;P
looking at your DA page and HOLY ****! i'd almost murder someone for skills like that :D
anyway GREAT first submission to Newgrounds and keep making these plz.