From the author's README on Thunderstore

Santa Cruz X Pokémon

-15 Holographic Santa Cruz x Pokémon Decks from the 2023 collection. -5 Gold Santa Cruz x Pokémon Decks from the 2023 collection. -2 Mob x Pokémon Grips also from 2023.

In game

Decks are in deck category, Grips in grip.

Credits

Reskate for the tools and experience we deserve. Strumzino for showing me how to do the golden decks. Santa Cruz for the beautiful deck collection.

Install Santa Cruz X Pokemon

You need ReSkate and your own copy of skate. on Steam.

Open ReSkateLauncher.exe and go to MODS.
Search for Santa Cruz X Pokemon and click install. The launcher also installs anything it depends on.
Press PLAY. In game, the MODS tab of the ReSkate menu (Insert) turns it on and off.

Or install it by hand: download the .zip and drop it on the launcher window, or unzip it into its own folder in Mods\ beside Skate.exe.

Maps show up in the ReSkate menu's level list. To join a server running a custom map, you need the same map installed. If the game won't load after installing, see known issues.

skatemods doesn't host or review this mod. The download comes straight from Thunderstore. Only install mods you trust, because scripts can run code.