How do you get the wireless adapter in Pokemon FireRed?
Wirless adapters are accessories that can be attached to your GBA or GBASP that can be bought at any video game store or E-bay.
Trading in Firered On Pokemon Firered, you can start trading Pokemon at the first Pokemon Center. If you have a gameboy advance, you'll need a wireless adapter, but if you have a DS, a wireless adapter is useless and it MAY work since a DS has a wireless adapter in itself. It doesn't work on my DS but it has on others. (in order to trade to the DS games you must trade the Pokemon…
Is it possible to battle Pokemon between Soul Silver and Fire Red using a wireless adapter or cable on the top floor of the Pokemon center?
In order to use mystery gift you first need to unlock it, second you need a wireless adapter, third you need to go to a Nintendo event that is giving out a Pokemon that can go to firered or leafgreen bring your GBA and wireless adapter to the event and access mystery gift at the event you can receive the special Pokemon now.