I haven't played a Pokemon game in a long while, last one being soul silver. I'm about 6 hours into black 2, really enjoying it, but I wanted to transfer some eggs or newborn Pokemon from soul silver to my copy of black 2 using a secondary 3ds is there anything I have to do in black 2 first before being able to do this?
Yes you would have to beat the elite 4 and then go to route 15 there will be a building called Poke' Transfer Lab which can only be obtained upon beating the game.Instructions on how to use it will be explained there.