Manipulate your prizes with Peonia, Munna, and Mr. Mime to set up both the dream ball and greedy dice. If you need something out of your prizes, the combination of Peonia and Mr. Mime reveals 4 cards. Being able to play both Mr. Mime and Peonia is helpful because it makes it easier to have the right cards in your hand to perform a combo, and you can even play both in the same turn or play both multiple times. Mallow is also helpful since she can simultenously get you Mr. Mime and set up the top-deck to put into the prizes.
In this build, you can play Drapion with 2 energy fairly easily, which is super powerful since it will paralyze the opponent. Drapion KOs any Pokémon with 120 HP into your turn, and Dragapult can fix the math so that happens with Pokémon up to 150 HP. The ideal early-mid boardstate consists of Gardevoir, Drapion with two energy, and Drakloak. No matter who your opponent tries to KO, your other Pokémon will give them trouble. Boss Gardevoir, and you allow both Drapion and Dragapult to get powered up. Boss Drakloak, and you might be able to put Dragapult on the bench with Dream ball. KO Drapion, and you have to deal with Dragapult.
The deck also features efficient attackers such as Galarian Articuno and Banete, which are ideal for taking a quick prize. My favorite part of the deck is with Gardevoir since if it doesn't get taken care of, it allows all of your Pokémon to attack very cheaply, and if it does get knocked out, Malamar is an easy replacement.
Note: the original version of this deck is similar, but doesn't play greedy dice or Mr. Mime. I added the greedy dice as a meme, but ended up liking how it turned out. If you want to make space for other staple items, those may be the cards to cut.