Plug the cable into both GBAs,and have both players go to the rightmost counter on the top floor of the Pokemon Center. Have one become the leader, and the other join group.
It is the same as any other games, but you can't trade with other pokemon games. You can only trade your pokemon from the different generation games, you can't give your white version pokemon to the earlier generations.
Trade.
after you beat the Pokemon league
You have to trade them from other games.
No but i think you can trade it from other Pokemon games
Migrate or trade for them.
trade from other games
you have to trade them from other Pokemon games
Trade it from other games
i think you have to trade them from other games
Yes, with Diamond/Pearl and Platinum.
You cannot trade Pokemon on from other games (unless it's Pokemon black/white) until you have defeated the elite four.