I'm pretty sure we at PU will make places available that allow pokemon to evolve who need to be in a location to. For instance, in B/W Chargestone cave acts like Mt. Coronet, so we may have an area that acts like that as well, along with areas for Eevee. For the beta, I'm not too sure, so as Genbor put, a stone, or maybe some kind of NPC would make that process happen.