to be completely honest with you goraka... this is first time i've been a little disappointed with your sprites. i must disagree with the other posters on this thread.
props on your mk4 reptile, and noob saibot. i take no issue with those two.
but for the others... im just not seeing quite enough color definition, at least i think thats how i would describe it... i know you have a small image to work with, but the black borders around the colored squares on each costume seems... too sudden. there is no shade of color, or maybe it's that theres too small of a border. i can't really put my finger on it, but perhaps you'll understand what i mean.
but as always, this is a language i dont speak(as far as sprite editing). so i still have to appreciate the work done. overall i give a 7/10