All I got to play was the demo of the original (because I don't have any Wii Points). It was a different experience than the other spin-off Pokemon games. It was a lot of fun. This should be good but we will have to wait and see reviews for the game to tell if it is better or worse than the first. I think that, unless it has tons of content, this would be better suited to be a 3DSWare title over a full retail game, but who knows, it may be worth $40.
EDIT: I forgot, the game comes out next week in Japan. Hopefully it gets good coverage. One site I know will for sure have info about the game is Serebii.net if you want to find out more. Some information has come out about the game but not much.