Pretty cool looking game, the sprites in particular are pretty nice
One thing I would suggest is doing something to make the super moves more straight to the point. One issue a lot of Saint Seiya Mugen characters have is that they subject you to watch a whole cutscene before the super move finally comes out and it just makes the fight a bit more of a slog as a result.
Very good animation, but Kyo's shoulders in CvS sprites are broader than that, along with his arm looking a bit too skinny for his CvS design. Definitely recommend comparing it with his CvS sprites more to make it more consistent
Thanos's sprite design always pissed me off, so I tried to make him look less flat and more threatening, while keeping the overall lines and palette the same, and keep the shading authentic to Capcom's other sprites at the time.
Feel free to use this, if anyone would like to go further with this idea. Just remember to credit me, I guess.
That's a very good looking Kula. There's just a few things I'd recommend tweaking. After comparing her standing sprite to the CvS and KOF sprites, I feel like her legs are just a pixel too long, and I'd advise to be careful with not making her head too big. In this animation, all you'd need to do is bring the top of her head down by a pixel and it'd be good. Only other thing that I feel didn't translate quite well from XIII to CvS are the leg proportions, with her legs looking very skinny. CvS sprites tend to emphasize the shapes of a characters proportions a good bit, so at the very least, I think her leg shape would be closer to how it was in the older KOF Kula sprite design.
Quick edit I made to help showcase what I'm suggesting, if you'd like to use it.
This doesn't look smoother, it just looks worse. It doesn't look like a new alternative sprite style, it just looks like "KOF but bad". It's visually unappealing to look at, and I know I can't tell you what to do, but I personally genuinely miss back when you actually made a genuine attempt in making good looking CvS sprites, instead of this ugly "simple" sprite style that you keep insisting on making it work.
I'm not usually this negative towards anyone's work, but there's really no other way of seeing it. You literally took someone else's sprite (with credit, granted) and removed everything that made it look good. There's nothing good I can say about this, and I can't imagine playing a fighting game where the sprites look this bland.