Customization confirmed to be Kalos only until some Tumblr fag figures out how to make it a, "Gamefreak is racist!" shitstorm and causes them to backpedal faster than they did with Jynx
And no Mega Milotic. I'd say it could come in DLC, but Gamefreak is horrible at programming error handling so they wouldn't dare in case somebody played the game on an unpatched 3DS and made it shit itself