These are things you will need before starting.
VBALink
Link:
http://www.vbalink.info/download/vbalink180b0.zip
A Pokemon Game ROM(no link will be posted you can google these)
An internet Connection(for trading/battling with friends)
After obtaining above files follow the steps below to start Trading/Battling.
This process will take you in and out of the options menu quite a bit.
Steps 1-4 are the same for both people trying to connect to each other.
Step 5 only needs to be done for whomever want's to host the connection.
Step 6 is for the second person to connect to the host.
Open VBA.exe extracted from the .zip file from above.
Do Not Open The Rom Yet!
Step 1: Click Options, and hover over Emulators you will see Save Types go there and check Flash 128k.
http://i769.photobucket.com/albums/x...-Flash128k.jpg Step 2: Then click Options again, hover over Emulators, and make sure the Pause when inactive window option is checked.
http://i769.photobucket.com/albums/x...lator-Pwiw.jpg Step 3: Go back into Options, this time hover over Link, and check Wireless Adapter.
http://i769.photobucket.com/albums/x...ns-link-wa.jpg Step 4: Go back into Options again, hover over Link and click on Link Settings, and check Network not Single Computer.
http://i769.photobucket.com/albums/x...k-settings.jpg Step 5:Now go to Options, then click Link Settings, go to the server panel and hit the Start button.
You will see an IP Address in a box,send the Ip to your friend, you will want to keep this open until you are connected.
I'm not going to post an image of the box that pops up(I'd like to keep my ip to myself lol)
http://i769.photobucket.com/albums/x...ngs-server.jpg Step 6: When they have received the ip they will input it here, and hit the Connect button.
http://i769.photobucket.com/albums/x...ngs-client.jpg
Both of you should be connected in a few short moments(could be slower depending on the computer). Now you can go to Pokemon Center and talk to one of the women on the second floor, to either battle or trade pokemon via wifi.
Enjoy XD