Instructions
Travel to any Poke Center, located in all major cities, and walk up to the second floor.
Walk in front of the third woman and press "A" to initiate conversation.
Select either "Battles for Two" or "Battles for Four," depending on the number of people you want joining the battle.
Select either "Single Battle," "Mix Battle," "Double Battle" or "Flat Battle," depending on the type of battle you wish to have.
Select the rules for your battle, such as "No Restrictions" or "Little Cup."
Select "Yes" to save your game.
Select "Become Leader" on one of the consoles attempting to connect, and select "Yes" to launch wireless communications.
Select "Join Group" on all other devices, followed by "Yes" to launch wireless communications.