Not sure if anyone has seen this yet:
This is a double battle shown in an XY preview. 3 things I want to point out are:
1. The move Topsy-Turvy seems to be a stronger version of Contrary. Malimar used it on its teammate Noivern after it had used Draco Meteor (animation looks awesome, btw) and it ended up with a +2 in its Sp.Atk instead of the -2 drop.
2. Politoed has Drizzle--which means that either the Dream World will still exist or that it will be possible to transfer Pokemon from older games into XY.
3. The battle ended with a 1v1 match between Politeod and Sylveon. Sylveon took 2 Life Orb boosted, rain boosted, STAB Hydro Pumps, one of which was a CRITICAL HIT, from Poli and still had about
50% health before taking Politoed down with Moonblast. Now I know that Poli doesn't have the best Sp.Atk stat but taking 2 LO Hydro Pumps in the rain with one being a crit from anything has to be a 3HKO just about any Pokemon and Sylveon could have taken maybe 2 more hits before going down.
TL;DR - Sylveon has a base 200 Sp.Def #SylveonForUbers