all promo pokemon cards Custom Pokémon-Style Card Lot — 25 Best of Game (Holo) & W [Fighting]2 Pokemon TCG Scarlet/Violet Pikachu Promo

1 in every 4 packs (give or take) contains a 13th card from this special list of cards in place of an advertisement or token within the pack (not counted in the 12 cards), and while some are dud commons that tie in with a sets theme, others can be quite valuable

"Pokemon Sword & Shield: The 18 Best Generation 8 Pokemon, Ranked"

The sheer difficulty of this cards acquisition meant that there are now very few officially distributed copies in circulation, making them exceptionally rare and incredibly desirable by fans and collectors alike

Its a viable wincon for said decks, though Ive never been much of a dancer myself