I come to you fellow pokemon lovers as I need help.

I haven't played a pokemon game since generations 2's Silver and Gold (the originals).

I am considering buying Black 2 for the simple fact that I love playing with all the eevee evolutions (and eevee) and that I'd be able to catch eevee in the wild for once instead of having to do a bunch of complicated repeated play throughs to get enough. It'd be fun to play pokemon again, play with my all eevee line up and check out the two new evolutions at last.


So here is my request: What has changed from Silver/Gold to Black 2/White 2?