Toys R Us is currently running a promotion for 3DS and Wii U games to buy one and get 40% off of another. This promotion is running all the way until 10/12, which means Pokemon X & Y is included. Pre-orders work just fine, so if you want to use this promotion to order some upcoming Wii U games, you could save yourself a considerable chunk of change.
All Wii U and Nintendo 3DS titles are included, including the upcoming Pokemon X & Y. It’s worth noting if you don’t want to order from Toys R Us online, you can mention this online deal at your local store and many of them will price match. Some retailers like Walmart will also price match promotions, so if you don’t want to order online and you don’t have a Toys R Us in your area, Walmart might be a viable option.