mimikyu card sleeves 66 x 92mm = 2.59 x 3.62in Material Pokemon Deck Sleeves - Etsy

The following rarities are the standard rarities within the game of Yu-Gi-Oh itself: Common Super Rare Ultra Rare Secret Rare Ghost Rare Ultimate Rare Prismatic Secret Rare More recently Konami has introduced the Quarter Century Secret Rare to Yu-Gi-Oh too

Mega Genger ex's regular and Shiny variant brings the "Labyrinth of Shadows" attack, which deals 120 damage (requires 3 Dark energy and 1 Colorless energy) to opponents and prevents them from using any Trainer cards on their next hand

Some other cards that fit into this category, but will probably be worth less money, are Zacian V, Zamazenta V, Hisuian Samurott V, Hisuian Goodra, Latias, Darkrai VSTAR, Diancie, and Thievul - all of which are Secret Rares

Regardless, youll want to make sure that youre including enough low-level monsters so you can use them as tributes and materials for higher-level monsters - otherwise you risk ending up with a hand of cards you cant even play