Okayyy since I saw this has like thread has like 11 pages and I wanna say all I know about this game, but dont wanna read all the pages to see if its posted- ill just post what I got.
It now uses 3d more than it was used in the goldenrod tower in HG/SS
You can play WITH other people on it (not only in battles! You actually WALK with them trough the isshu region, along with doing a few online missions! Tough I think its wireless...)
The game has some converting mechanic that lets you convert 6 pokemon each time from older generations (diamond, pearl, platinum, hg and ss, cause they cant connect with B&W) and while at it, you need to play a minigame called miracle shooter to capture all the converted pokemon. Not known if you can use this once each 24 hours like from the GBA to DS games in pal park or not.
Has a pokemon musical instead of contests. Yeepie.
ALSO! One big thing! The game isnt just sprites anymore, everything's moving!
In battles, theres triple battles (as you might know), rotation battles (I dont really get what's that...) and the ability to combine attacks that are the same name just diffrent types, if you use them in the correct order.
Ex: use the new attack Grass Oath then Fire Oath and it'll... Do something... That adds stat or stuff... I forgot =P
The enemy team (like galactic, rocket) is team Plasma, they have even wierder suits than galactic! (If thats possible)
... I think these are all the things worth telling.... Anyway as you sure know since it was in the first page-
www.serebii.net provides alot of info for this game, and it keeps updating almost daily, or weekly, to be exact.