The anonymous user probably just wanted to either fill-in-the-blank (even though the answer was not constructive), or was trying to draw attention to him/herself. I have removed the unconstructive answer. It should be reported to WikiAnswers if the question is continually vandalized.
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
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 use it for catching Pokemon but you need a wireless adaptor (emerald version)
You can unlock the Berry Crush game, the Union Room, and the two Mini-Games on Two Island
Mudkip can only be owned in Pokemon FireRed & LeafGreen versions by trading from Pokemon Ruby/Sapphire/XD/Colosseum. Trading from these games requires the National Pokedex, the Ruby and the Sapphire. You must give the Ruby and the Sapphire to Celio at One Island. Trading requires a Wireless Adaptor.
The point of the union room is to talk and trade with a group of friends with the wireless adaptor.
You can't! You either use a Gameboy Advanced SP or the Gameboy Advanced. Lo siento.
buy a gba wireless adaptor and link up with someone who has one on the top floor of any Pokemon ceter