Nope no wifi, or I dont recall seeing it, It was really similar to the first one, just new characters and a new mode I believe, Wasnt anything to special, If you liked the first, You'd like this one.
It's a fun game!
Though I imagine they could add a few more features to it, i.e a little more polish!
Not bad by any means and an enjoyable fighting game on the wii. Definitely an improvement on the first game.
Tenten is a playable character, which obviously increases its score drastically.
(I apologise, I'm a huge tenten fan)