>>14357731PokeTransfer via Pokemon Bank. It's a 3DS app that releases December 27th. You download them from the eShop. The actual downloading is free.
You send Pokemon to the Cloud from BW or BW2 (any and all) from PokeTransfer, then you use Pokemon Bank to retrieve them in Pokemon X or Y.
The service costs $5 for a whole year of use, but it is free for the first month.
>>14357842Yes it is the only method.
But you don't have to pay for it if you just do it immediately. There's no reason to even use it after you dump all your old guys anyway until the next generation.
>>14358979Gen V didn't allow you to transfer items either, so I don't know why this is much of a surprise.
>>14361812Pretty much this.
I sat down and completed my Black 2 Pokedex before September ended and have at least one stage of each evolutionary line available in the boxes.
I'm only sending over my past teams, my legendaries, my shinies and anything that is not available in Kalos.