Milcery has the following attacks: Sweets Relay - 10 damageIf 1 of your Pokmon used Sweets Relay during your last turn, this attack does 20 more damage
You need to land consistent coin flips, of course, but Celebi ex even has a way of mitigating that through Serperior, who can double the amount of Energy attached to Celebi ex, thus doubling the number of coins it can flip and the potential damage it can do
The following rewards await you for your (first) victory: Shiny First Time: 2 Pack Hourglasses, 50 Stardust, 1 Shop Ticket, 25 XP Afterwards: 25 Stardust (100 %), 1 Promo Pack (51 %), 1 Shop Ticket (38.7 %) Turok & Urgl First Time: 4 Pack Hourglasses, 100 Stardust, 1 Shop Ticket, 50 XP Afterwards: 25 Stardust (100 %), 1 Promo Pack (64 %), 1 Shop Ticket (48.3 %) Blastoise-ex First Time: 6 Pack Hourglasses, 150 Stardust, 1 Shop Ticket, 75 XP Afterwards: 25 Stardust (100 %), 1 Promo Pack (80 %), 1 Shop Ticket (60.4 %) Blastoise-ex & Vaporeon First Time: 8 Pack Hourglasses, 200 Stardust, 1 Shop Ticket, 100 XP Afterwards: 25 Stardust (100 %), 1 Promo Pack (100 %), 1 Shop Ticket (75.5 %) Which deck should I use
Most people have terrible decks, because its currently very difficult to build good ones, even if you spend a lot of time playing the game