Who's Next? -finished version-

If it helps, full view. I have a ton o' detail in there...

This is Dark Super Sonic (as I see him). He's probably the only one in the roleplay that's competely insane. The reason he goes into this form instead of his normal Super form is rather simple: When he absorbed Negative Chaos Energy from all seven of the Chaos Emeralds (that's right, all seven), he went into this form and went on a rampage. When he was finally subdued, most of the Energy left him. But not all. Like when he reverts back to normal from his Super form and some residue Positive Energy stays in his body, the residue of the Negative Energy stayed in his body. Negative Energy, in a way, is stronger than Positive Energy, and because of so the Negative Energy "got rid" of whatever Positive Energy was left in him after the transformation by either changing it or just forcing it out. This was risky alone, for Sonic's body (thus his internal organs) had gotten used to the Positive Energy, for the most part relying on that energy, and his body wasn't used to any Negative Energy. If his body couldn't get used to the Negative Energy, well, he'd be screwed. Thankfully, his body did get used to the Energy, but this still wasn't good. Whenever the hedgehog got pissed, stressed, or if there was a large amount of Chaos Energy near-by, he would go into his Dark Super form. Plus his body can't absorb Positive Energy anymore, for the Negative Energy would react and force it out before it can do anything.
Now, Sonic has gone into his Dark Super form a good amount of times, but only a few times did he acually do a large amount of damage. First time was his first transformation, where he wiped out Central City and killed Sanom (he was revived, though). The other time that I can remember was when Korja and Twister attempted to give Sonic swimming lessons, and Dark Super appeared, destroying the town everyone was staying at and getting into a huge battle with Sanom, a single, powerful attack nearly killing them both and leveling what was left of the town. Another thing worth mentioning, though he didn't do a large amount of damage, was when Sonic was forced to go into his Dark Super form to battle Wolf, who was in his own Dark Super form. The two battled, but Wolf managed to kill him (though, of course, Sonic was revived thanks to some help).
Dark Super Sonic has a nice range of attacks, stemming from hand-on-hand combat to attacks using the Negative Energy (which are called "Black Chaos" attacks, thanks to their black color). Chaos Energy attacks worth mentioning are Black Chaos Flare, Black Chaos Wave, and Black Chaos Lightning (all have a regular equivalent). Black Chaos Flare is a blast or stream of Energy that takes the form of fire. Black Chaos Wave is a large wave of Energy, and Black Chaos Lightning is a huge bolt of black lightning from a black Chaos Energy-formed cloud. The last is probably Dark Super's most powerful attack, capable of leveling a town and destroying anything and everything, and is much more wild than its normal Chaos Energy equivalent. He also uses a range of unnamed attacks, from jets of Energy to blasts of Energy, along with his dark red eyebeams.

o.e .... ABOUT TIME I GOT THIS EFFIN' THING FINISHED! *drops dead* Working on it since I got my friggin' tablet... So yes, this is the insanity known as Dark Super Sonic. I would've had this done last night, but I had to wait for my brothers to go to sleep, and by time they did, my mind was too wrecked to work on it. So I finished it in the morning. Yep... You can tell my basis for this dude. Coloration of Dark Sonic from Sonic X (he needs to appear again, damn it!), and Fleetway Super's eyes and insanity. Now, if I forgot some information that is worth mentioning, please tell me, for my mind does not work well before noon. XD

Program: Adobe Photoshop Elements 4.0
Number of Layers: I dunno... Too many.
Time taken: Gah... So many hours it ain't even funny...