this is pretty simple all you have to do is very easy!
just print your fc code(friend code which you can actually be found in your pal pad on your key items.)
on three easy steps:
HOW TO BATTLE: go to a pokemon center. go down stairs. and enter the Wi-Fi Club (door on the middle). and log-in.
THINGS YOU'LL NEED: Pal Pad, and eight jhoto badges(prefered)
well have fun