Finished with Challenge Mode Elite Four and Champion. Difficulty varied, one time I managed to have a real easy time with Shauntal, but I didn't want that so I restarted, then I ended up being down to one Pokemon(I was doing 5 vs 5, so I left Flygon out as it was making things easier for me). Same thing happened again a few times, but in the end I was able to do 5 vs 5 and come down to one Pokemon each time. I also got lucky a few times with getting Flinches and Critical Hits in. Then with Iris, I lost a few times(I restarted when I lost, didn't want to start all over again), but when I did win I had two Pokemon left, Zoroark who had little HP and Serperior who had full HP. I probably lost(Including restarting before I lost, sometimes started off rough and I knew it wasn't going to get any better) around 10 or so times.
3DS Friend Code: 3153-4608-8374
Friend Safari: Steel(Ferroseed, Forretress, and Bronzong)