Turns out there big surprise was a code hunt...

https://twitter.com/Pokemon

EDIT:

Here's the video they added, for those of you who don't want to see a Pokemon dub step video (which I completely understand), the code is XY1012 and can be found at 1 minutes and 3 seconds.

ANOTHER EDIT:

Chrono gave me the codes, so anyone for who wants some cool wallpapers or ringtones: