I got a bunch of awesome Pokemon, and I want to do battles like all of the youtubers where you battle 6 vs 6, with all the Pokemon at level 100. I can't use a lot of the Pokemon I got on Random Matchup (they're guys like Mew, Arceus, Jirachi, Celebi, etc.) and it's only 3 vs 3. Is it possible to do the 6 on 6 level 100 battles?
Yes, the middle lady in the Pokemon center hosts the Wi-Fi Club which allows you to use a full 6-6. But you need Friend Codes to enter that room. Also, you must be able to connect to the internet on your system. You can change that with your system settings. You get friend codes after you receive a pal pad. You automatically get assigned a code that you exchange with your friends in order to show up in the union room and wifi club. If you still need help, comment.