I think there is a chance team preview might be turned on for the VGC11. There are two ways to fight on b/w: C-Gear or wireless. C-Gear permits items during battles (that's medicine items like Max Revive, Full Restores etc.), and wireless has team preview. So chances are, the C-Gear won't be used or there will be people spamming Max Revives everywhere, so that leaves wireless and its team preview on.