>>25290269I made it that first time with
fully candied M-Manectric/Zekrom/Shaymin (or Virizion, I forgot)/Chespin. I've managed to consistently win after that with
14-candy M-Rayquaza/Shaymin/Virizion/Chespin.
4 wins later and I still haven't caught it.Results may vary based on how many candies you have on them, obviously.