It's morning in Japan now, so leaks could appear at any time. (This does not mean they will come out. They are not scheduled, just people are usually awake at certain times and more likely to visit a store between 10 and 8 Japan time. 9p-7a Eastern time)
Here's a few places to look:
Search Twitter for:
コロコロフラゲ - CoroCoro Furage, Which means early buy
コロコロ - Occasionally someone will just call it corocoro, but most of the time you see pets
ポケモン - Pokemon in Japanese.
ポケモンフラゲ - Same idea as above, but focusing on pokemon

I may have already found a user with the issue, but they did not post the whole thing before and it's highly unlikely they will this time.

Also good places to look:
http://kohada.2ch.net/poke/ - Anywhere there, but most likely the XY General
http://hayabusa.2ch.net/news4vip/ - Look for the BW2 General.

All these sources can easily be traversed with your preferred translation service.