The core loop starts with Festival Grounds in play. Any Pokémon that has the Festival Lead Ability, including Dipplin, Seaking, and Goldeen, may use one of its attacks twice per turn while that Stadium is active. If the first use Knocks Out the opponent's Active Pokémon, the second use fires after the opponent promotes a new one. That means a single attacking turn can threaten two Knock Outs from one Energy.

Dipplin's Do the Wave deals 20 damage for each of your Benched Pokémon. With a full bench of five, that is 100 damage per hit, and with Festival Lead active it can hit twice, or chain into a freshly promoted target. The deck runs four copies of Buddy-Buddy Poffin to search out two Basic Pokémon with 70 HP or less at once, and four Poké Pad to find any non-Rule-Box Pokémon from the deck, so filling that bench quickly is straightforward.

Thwackey ties the search engine together. Its Boom Boom Grove Ability lets you, once per turn, search your deck for any card and put it into your hand, shuffling afterwards, but only while your Active Pokémon has the Festival Lead Ability. That condition is met whenever Dipplin, Seaking, or Goldeen is in the Active Spot, turning every attacking turn into a free Trainer search on top of whatever Items you play. Four copies of Lillie's Determination back this up as a draw Supporter, drawing 6 cards or 8 cards if you have exactly 6 Prize cards remaining.

Gladion's Final Battle adds a damage boost when it is the last card in your hand: attacks used by your non-Rule-Box Pokémon deal 80 more damage to the opponent's Active Pokémon that turn. Brave Bangle adds a further 30 damage against Pokémon ex. Seaking's Rapid Draw hits for 60 damage and draws 2 cards, and with Festival Lead it can do that twice, keeping your hand topped up mid-game. Rabsca sits on the bench to prevent all damage and effects of attacks from the opponent's Pokémon done to your Benched Pokémon, protecting the wide bench you depend on.