no
you can only use wireless adapter on GBA devices,
You can use router of G or N type and the same type wireless adapter. Of course you can use wireless N adapter with G-type router and reverse.
yes, emerald is combatible with the wireless adapter... but it is not compatible with the built in wireless in the Nintendo DS
okay the wireless adapter isn't just for fire red for one and a wireless adapter is what you use to hook up 2 game boys together wirelessly.
It's not about computer, it's about which wireless adapter you are going to use. If you want take advantage of Wireless-N, you have to have a wireless adapter N.
If you want to use wireless connection yes you need a wireless adapter.
If you want to use internet wirelessly, yes you need a wireless router and a wireless adapter for your PC (usually laptops have it).
Yes
No.
no
You can't.
You can just disable device, there is no need in disconnecting the G adapter.