So apparently if you save your game in Lumiose City and load it up, it'll freeze on you and you need to delete your save to get it to work again.
Hasn't happened to me, but has it happened to any of you? If so, is there any way to fix it besides deleting your save that you've found?
Also, GameFAQ thread link: http://www.gamefaqs.com/boards/696959-pokemon-x/67488169