There are 2 main parts to the deck, an insta-kill brongzong break sweep, and the ultimate stall to get bronzing up.
1. You lead with Sylveon Gx and spam magical ribbon until you have all the necessary cards for the following steps.
2. You play down Oddish, Zapdos Ex, Mr. Mime, and Victini. This shuts down all damage to the bench and prepares us for the other portions of the combo.
3. Give Zapdos Ex a lightning energy, any other energy, and a trick coin.
4. Play Glimwood Tangle
5. In the same turn that you played Glimwood Tangle play Dark Vileplume onto Oddish using Rare Candy. This disables ALL trainer cards which significantly limits your opponent but most importantly eliminates the possibility of Boss's Orders swapping you into brongzong and other vulnerable cards.
6. Swap into Zapdos Ex and spam Agility while charging Brongzong Break. The Victini, Trick Coin, and Glimwood Tangle allow you to flip 4 times for invincibility hopefully giving you enough time to charge Brongzong so you can swap up and sweep your opponent in 1 turn.