Yes
wifi global
YES
You have Wifi battles in the bottom level of the Pokemon center
act fast and get him on wifi event
yes you can my friend
Yes.
you need a router to get wifi to go online. And you need wifi to trade internationally
Yeah, if you mean the WiFi battle in the Union Room.
get soul silver or heart gold and click receive gift over wifi and you might get jirachi check over wifi every week
Yes it is possible but it is not possible to battle people with ds from your computer and i prefer pokemon gold not silver
you have to stay in the wi fi room for at least 45 minutes
You still get friend codes.