Xmen and Streetfighter, made to match.
Gameplay: Truly great, you pick 2 characters and you go to bat it out with your opponents choices and then at any time If one character is getting its butt whooped, you can switch him out for maybe more punch, speed or whatever. Amazing specials and tons of combos.
Graphics: Pretty decent, looks a bit improved from most fighting games, but not really "shocking".
Sound: What would it be without it, you gotta hear the grunts, and the swoosh of the punch. Plus hearing Ryu yelling, is a major bonus!
Overall: I love this game, I've played it about 1000000 times.