The game uses a system of for buttons, one for run, punch, kick and grapple. When you grapple you have a choice of four different moves to do in that position. If there is one word that describes this game well it is limited. The moves are limited (why have separate buttons for punch and kick when they do exactly the same thing.) The game options are limited, you can only fight either one on one, tag, or survival (four on four.) Combine this with the lack of moves and you have a very short lasting game. Chances are after half an hour from switching it on you will be thinking 'is this it' and then realise it is and switch it off. It could have been better if the characters controlled any different to each other but unfortunately they all handle exactly the same with no differences whatsoever which is unforgivable really. The graphics are dire and the characters are poorly animated, there is no skill to winning the game other than being able to tap a button fast, the sound is dire and the effects are poor. So basically there is nothing to recommend this game to anyone, instead buy the sequel Royal Rumble which added more variety, signature moves for the characters and a ton more lastability. Steer well clear unless you are a masochist.
You might also like to check out Chrono Trigger for the Nintendo SNES.
or alternatively Mega Man X for the Nintendo SNES.