You can't
You need a wifi router or a Nintendo wifi usb
As far as I know, you can. I have a suicune and i can battle with it everywhere,even wifi.
First you have to have wifi. If you do than you have to beat the game and go to the fight area. then go to the right for a while than go to the battle tower and chose battle using wifi.
By not hacking them
Sure I will battle :D
You use wifi for Gts (global trade station) Battle ppl who are faraway. You have to have a wireless router to get wifi though.
You can trade, battle, and have voice chats with your friends over Wifi in Pokemon Diamond/Pearl, but to do so you need to know your friends' Friend Codes, and your friends need to know your Friend Code.
it is used to allow you to ave friend to trade/battle with over the WiFi connection and you get them by trading/battling with friends in the pokecenter.
a BIG NO
I will
yes
Yeah.