I recently purchased this game on the Wii and am happy with it. It cost 800 points but was worth the spend. Fight your way through streets full of bad guys, sword wielding she-killers and henchman galore.
Half the fun is discovering the specific special moves of your character; you have a choice of 4 characters, but anyone whose anyone will choose Axel or Blaze (the characters with the best all-round stats). Pick up weapons and health along the way for that extra little something. After a few kills your power bar will max, allowing you to perform a more damaging move.
This game provided a well needed nostalgic trip to megadrive heaven and amazingly has somehow improved with time. Nothing to complex about it; just kill everyone who gets in your way.
If you do find yourself with some spare wii points; this is a good purchase. Although Street Fighter is definately a better choice for an old school fighter game.