Simply attach it to the top of your GBA if another GBA close by has one as well you can use them to trade Pokemon in firered version, leafgreen version and emerald version. That unfortunately was its only use.
There is no emerald to trade between firered and emerald you need wireless adapters.
No
yes with wireless adapters or a link cable
Ruby, sapphire, emerald only by wireless adapters, another firered, leafgreen and Pokemon colosseum and Pokemon xd gale of darkness.
With a wireless adapter, you can do nothing, but with a game link cable, you can trade and battle!
The Wireless Adaptor is only compatible with Pokemon FireRed, LeafGreen, and Emerald. It allows you to enter the Union Room and connect to another game that also has a Wireless Adaptor without a Link Cable.
Click on the link (under Related links): GameFAQs: Pokemon FireRed Version (GBA) Changes FAQ by strawhat---- When you get to the page, press CTRL+F (to find), then type: wireless adaptor. You should find the information you need.
You can get Teddiursa in The Altering Cave on Outcast Island if you have your wireless adaptor connected. Or trade from Emerald using the wireless adapter.
One place where you could get them was in special boxes of Pokemon FireRed and LeafGreen. There might have been other games with them in, but you'll struggle to find them in stores these days.
Connect With Somebody With The Wireless Adaptor
Use wireless adapters.
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No, GBA games in a DS can't use the DS's wireless functions at all. That's even if it's a game that did have wireless capabilities through the GBA wireless adaptor, such as FireRed and LeafGreen.
You have to buy one.
There is no emerald to trade between firered and emerald you need wireless adapters.
you use it for catching Pokemon but you need a wireless adaptor (emerald version)
No