A little while ago, there was an issue going on with battling online with random people in Pokemon X and Pokemon Y. Some unscrupulous players were using a program to see a user’s team before battle. They were even able to see what moves the opponent chose. It seems that Game Freak took notice of this exploit, for they released a mandatory patch earlier today that blocks this kind of exploit. I’m kind of surprised that people would go this far to cheat in Pokemon, but there you go. At least the issue was solved.
You can download this patch for Pokemon X and Pokemon Y from the eShop right now. You can also use the QR codes shown here to go straight to the eShop page. It’ll take 236 blocks of memory on your 3DS. You can check out Serebii for more information about the patch.