While Ive submitted cards to PSA using just regular plastic top-loaders, PSA highly encourages semi-rigid use, specifically the Card Saver 1, as shown below
Number 93: Utopia Kaiser X LIGHT Rank 12 [ Warrior / XyzEffect ] ATK 2500 DEF 2000 2+ "Number" Xyz Monsters, with the same Rank, that have material Once per turn: You can Special Summon Rank 9 or lower "Number" monsters with 3000 or less ATK that have different Ranks from each other from your Extra Deck, up to the number of materials with different names attached to this card, but their effects are negated, then detach 1 material from this card
Booster Bundles and Booster Boxes: More Cards, Better Deals For those who want to open larger amounts of cards, there are booster bundles
Once per turn, if your opponent adds a card(s) from the Deck to their hand, except during the Draw Phase (Quick Effect): You can make your opponent send 1 monster from their hand or field to the GY (their choice)
He claims to have been obsessed as a kid and still interested in them as an adult
This POKMON TCG SV2a - Pokemon Card 151 is a trainer's dream come true, featuring the return of Kadabra after an epic 20+ year hiatus, plus 9 of the OG Pokes including Mew ex and Alakazam ex