One of the most ridiculous games ever.
I haven't had so much fun with a 2-D fighter since Capcom vs SNK 2. The action is fast paced. With 56 characters and 3 on 3 fights, the diversity is pretty good. Some characters don't play much differently from another. However, there are some unique character styles, like Megaman and his changable arsenal, Hayato, Silver Samurai and Jin.
The specials are over the top (to say the least), the combos are over the top, and the super jump is over the top. It would have been interesting to play with a Street Fighter 3rd Strike-type counter system. The lack of an online mode creates a pretty big draw when deciding to get this, since not too many in my area play this and the ones that do...
Anyway, it's a lot of fun; a button masher with some skill required and something that leaves me wanting just more.