First off, Serebii finally started posting stuff, including the version exclusives and the full Kalos Pokédex! There's also the discovery thread which is full of info on all sorts of things! So keep an eye on that!
Now, on to moves! In addition to getting its PP buffed to 25, Vine Whip's power to 45. Not bad! Also, Bubble's power was DOUBLED, all the way to 40. Same for Fury Cutter, 40 power. Can you imagine it once was 10 power? Also, new move sighted on Vivilion: Powder (yes, just Powder), which causes the opponent to take damage if it uses a Fire move. Pretty sure it's meant to be "gunpowder", but, you know, censorship and all.
Mega Aerodactyl stats: 80 HP, 135 Atk, 85 Def, 70 SA, 95 SD, 150 Spd. Excellent spread, I have to say. Tough Claws is still a waste on it, but whatever, more attack, speed and defenses are always good.
Also, an NPC hints at Pokémon found in horde battles sometimes having their DW ability. I'll keep an eye on that, especially if gen 6 Pokémon (who we don't know the DW abilities of) are involved.
Edit: Okay, a few interesting tidbits from Serebii: you get a Lapras as a gift (KANTO CONFIRMED), there's an item that increases your attack and special attack by two levels when hit by a super-effective move (I don't think it'll have much of an impact, who would actually go out of their way to get hit by a super-effective move?) and perhaps most importantly, you get the Thunderbolt TM as a reward for the fifth gym! That is absolutely amazing. Also, you get Xerneas and Yveltal at a very similar point in the story to what it was in gens 3 and 4, meaning you get them with quite a bit of the main game left to go!