Trade eevee through IR connection. But to do this you have to have 2 ds's or 3ds's. One with black 2 or white 2. The other with black or white. Then when you start the game up. Go to the bottom screen and click IR on both device's. Then it will start the trade. When this happens go on your black 2 or white 2 get your eevee and then go back to your black or white game and pick any Pokemon to trade with. And you may know what to do next.