A short while after Pokemon X and Y launched, players uncovered a pretty nasty bug -- if you save outside in Lumiose City, your game may freeze, and you might be unable to load up your save. In a title like Pokemon where hundreds of hours are easy to burn, this can be devastating.
Thankfully, Nintendo recognized the problem, and has applied a patch to rectify the issue. All you have to do is load up the 3DS eShop, go to the updates portion, and apply the patch. I've been steadily making my way through Pokemon Y over the past week and a half, and currently I have around 320 caught Pokemon in the Kalos region alone. How are you guys doing?
Pokémon X & Y Patch Now Available On The 3DS eShop [Nintendo Life]
via destructoid http://www.destructoid.com/nintendo-patches-pokemon-x-and-y-fixes-massive-bug-264246.phtml