No, you do not need a Wireless Adapter in order for your Pokémon Black game to trade with other players however you do need access to a Wi-Fi Hotspot in order to trade online with other players.
Talk to the guy on the second floor of the Pokemon Center in Castelia City after doing +10 trades either by wireless or the Global Trading Center.
You can't. The only possible way you can get zekrom in Pokemon black is trading with somebody in pokmon white, in which you would need wireless communications, which some people don't have. hope this helps! :o)
Trading in FireredOn 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 to Pal Park i think)and in FireRed you can start trading once you've beaten the Elite 4 (i think)
trading
get wfi
There is no way of getting all beginner Pokemon without trading.
by trading it
You get by trading it from white.
Buy a new one.
you can only get Abra by Pokemon transfer or trading
Only by trading one from Pokemon White.
wireless on c gear