Okay then, and since my brother's decided he'll use Shadow, I might be using Blaze.
He's yours, although the Mask of Emulation isn't allowed, so you won't be able to use his power-copying ability. However, he's a robot, so making him a Bionicle should be easy. (plus you could make him a mage to give him a wide variety of powers instead of having him copy others'.)
Sadly, I've already given him to someone else. However, I'm negotiating with him to see if he'll give you Sonic in exchange for a different character, but I did give him to the other guy already, so you may need another character. However, if you want to make another similar character, (like Blaze or Super Sonic but without being super-powered,) then you could do that too. Also, the list has been updated accordingly.
edit: Scratch that, wotsiznum (the other guy who wanted Sonic,) said he'll take Knuckles, so it looks like you'll be getting Sonic, and I'll use Blaze. (although I have this strange urge to make a profile for Rouge now.)