According to people who preordered Pokemon Black and White at Gamestop, the much-anticipated 5th Generation Pokemon games will come out on April 22, 2011. Those who preorder them (as I hope to in the near-future) will be given the opportunity to download Zoroark into their games. It is unknown whether this will be a direct download or via a shiny Legendary Beast like in Japan.
Also, I picked up a copy of Pokemon Ranger: Guardian Signs yesterday after work, and I can't seem to put it down! It's every bit as good (or even better) than the previous games. The Sign mechanic adds new dimensions to play, the Pokemon Assists have greatly improved, and the mere idea of riding on a Legendary Beast is thrilling. Pick it up if you haven't already.