[State -2, Ponification]
type = PlaySnd
trigger1 = Time/AnimElem = x
trigger1 = anim = 62595
value = sx,x

This is what the opponent turns into when not being compatible:

Wait I don't get it, are you asking for people to contribute ponified versions of characters or are you asking for help coding it. If it's the former, probably would do better in Graphic Arts. If it's the latter, would probably do better in Development Help.

As far as coding it goes, well it depends on what you're going to do with it. Are you going to make t a static transformation ala Midnight Bliss or Red Arremer's winpose thing, or are you intending something like Alessi's Child transform move or Anakaris' Royal Judgement where the character can move around?

You know what reaaaaally bothers me in here? The fact that some of these (such as Sonic and Kung Fu Man) are just so leaned forward, that they are either about to fall or something got up their rear. I understand Ryu and Ken being alike, but you could've at least removed the headband from Ken, because... you know, he doesn't wears one. Sonic also looks like there's a hedgehog glued to his head instead, and I don't know what to think.

Also, Roll's eyes, I don't know if you intended that to be cute looking, but it's more horrifying than cute. Not only one eye is looking away from the other one, but the huge pupils just makes it look like she licked a frog. I'll also mention that some of these just don't look in character at all. Like, you did bother to make Wario look pissed, but you couldn't be bothered to do the same for Waluigi... his eyes are to cutesy for someone like him, and he doesn't feels ugly at all.

The main thing that bothers me about these is the fact that most of them seem to have around the same shape, with only their size/height being the difference in here. Like, wow, the only main differences are the color and the heads in here. It would give them more variety if you did something about their silhouette, instead of limiting yourself to the same pony shapes like every other brony out there does. For a sample, Waluigi could be far more skinny in his general shape, and you could just give yourself more freedom, regarding the head shapes and eyes.

This is something I never got, and that is the way nearly every pony sprite I see out there has no shading at all, and these sprites are not exception. Like, they could at least have some anti aliasing in them, so they would look less like something someone would make in MSPaint in less than ten minutes. But that's just my opinion there.

I personally don't like ponification in the slightest, but point is, if you're gonna try doing these, at least try to put a bit of more effort into the sprites, and not limit yourself too much.