That’s right! You can play online with whoever you want (as long as you have their friend code). The European magazine N-Zone gives a review of the game and has this to say about online play:

We want to clear up a rumor that is spreading around the internet: It is NOT true that you can only play against European gamers. If you have the Friend Code of a friend registered who is living on another continent you can play against them. The only problem is that you may suffer some lag issues.


This game is just getting better and better!

Source: Gonintendo