Ok, still though i have never seen serebii post anything that was fake, and i have been checking their site daily for 3 years. Bulbapedia i don't know about if they ever posted fake info. This poster doesn't seem fake though and it is an extension of the first one they showed so i don't see how it would be fake and nintendo more then likely would have said if it is fake or not by now.
Didn't see this until now XD Responding here cause its kinda off topic now for the original thread. According to Serebii we were supposed to get Sylveon info last CoroCoro. It was apparently posted as a news report (I can't find it now though) that CoroCoro's website said their's be more info on Sylveon, but no other site made any kinda report. And when the time came there was no news update so Serebii posted false info then.