Awesome, I get to wad this thing. Luckily for us, I know how to make the name of the frames unique and all that. So yeah. Since you have allowed me to do stats, I'm gonna go ahead and run by you what I think each character should have. You decide if it's good or not.
Sonic - Same as SRB2 Sonic
Tails - Lessened Accel from SRB2 Tails, but can run faster. He's so SLOW! Knuxies speed will do it, but he won't hit run frames until 34, needing a Speed Shoe to do so.
Knux - I'm going to give Knux speed 34, so he'll be faster than Tails, but slower than Sonic. Glide and Climb will be the same.
Silver - Not sure yet, but I know he'll have Tail's speed. Maybe he could have better accel and run on water. He'd be ability-less, OR I could soc up some lightning for him to shoot. Unless someone can soc some REAL telekinesis. (Make sure you give him a float for his running >_>)
Shadow - Sonic Speed, Run on Water, slow thok.
Mighty - This one might be tricky. I figure you can give him a spin dash that you don't have to sit there and charge to go really fast. Instead, you'd stand still, tap the button and go. Sonic Speed.
Ray - Sonic Speed, Glide/Climb, REALLY slow accel. Squerwls r teh kewl.
Amy - Same as SRB2 Amy, maybe, but she needs to have run frames should someone get speed shoes as her. Maybe she should have run on water, too, since Double Jump is a kind of useless thing >_>