A little bit differen

I think you've got something interesting here, however,I feel before you jumped into your match RP you should have done some developmental work. Bring us into the character, maybe some real life instances in where his personalities have maybe gotten him into some trouble, or things of that matter. When you just jumped into it, I know I personally felt kind of lost, asking myself "what's going on here?"

Where-as if you did some developmental work, like I said, kind of an off camera, inside the life of who he is, what might have caused this split personality in him, or when it started to take effect. Does he know he has this dark side of him or is he oblivious to it? You have so many ways you can take this kind of a character man, but it's not stuff that you can do with just a few paragraphs. If you enjoy writing, I'd actually sit down and start wrting out different pieces of dev work. So even as your doing your matches you can still do dev RPs and we (as members of the fed) can begin to slowly see the growing depth of this complex character.

The other thing I could suggest is maybe not use different finishers for both guys because the way you have it set up will not be easy for us to write as lol. I'd keep the moveset the same, but switch between personalities. But don't JUST SWITCH ya know what I mean? It should be some kind of a build up, something that triggers his dark side to ome out.

Kind of like if you've ever seen Dexter how he carried on a normal life but he was actually a killer. Which I mean he knew what he was doing but you get that point. That's my honest feedback.

Right, a trigger.

A terrible loss? Is he a hardcore junkie (not drugs, as in does he like blood)? A feud getting too heated?

An interesting trigger would be if you had the crowd be apart of the switch. Maybe it's something they chant- a word or phrase that flips him into his other personality? That'd be a different way to handle things.

Or if not the crowd, maybe just a phrase that anyone- including himself would say that'd cause him to flip over, as majority of the time people with DID [Dissociative Identity Disorder] don't understand or realize they have another personality because they're pretty much 'unconscious' during the entire state (dissociative amnesia).

That'd be an interesting way to turn him. The crowd could play a huge factor in how his personalities switch in and out. I also like HEEL's idea of them chanting something that makes him turn.

What if the trigger is that whenever someone says "You suck" his other side comes out. I feel like he shouldn't know about this other side yet. And later on he learns of it and uses it to his advantage.