You can trade from GBA to DS game by migrating via Pal Park. Put the GBA game in the DS then start up your DS game; you should get an option at the menu to migrate. After that, go to Pal Park to catch the Pokemon you sent over.
I don't believe you can trade Pokemon from a GBA game to a DS game. From GBA to GBA you have to put one game in one GBA and the other in another GBA. Then you connect the connector to both of them and begin playing/trading.
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i honestly dont get your question,add more information
You can trade from GBA to DS game by migrating via Pal Park. Put the GBA game in the DS then start up your DS game; you should get an option at the menu to migrate. After that, go to Pal Park to catch the Pokemon you sent over.
I don't believe you can trade Pokemon from a GBA game to a DS game. From GBA to GBA you have to put one game in one GBA and the other in another GBA. Then you connect the connector to both of them and begin playing/trading.
You can buy one of the cords here.
http://www.amazon.com/Game-Boy-Advance-Link-Cable/...
Good Luck!