The most obvious of these is that removing Prize Cards from the game altogether would drastically alter the ways that Pokmon TCG build their decks
Gimmighoul 44/91 Loading
Armarouge Easily facilitate Fire Energy to your Active Pokmon
It'd be just okay if the tokens created by Vren were measly 1/1s, but they scale with the number of rats you control
Bulk: $15/card, 25 card minimum, max declared value of $250, 30 day turnaround Economy: $25/card, no minimum, max declared value of $500, 20 day turnaround Standard: $35/card, no minimum, max declared value of $1,000, 10 day turnaround Express: $70/card, no minimum, max declared value of $10,000, 5 day turnaround WalkThrough: $150/card, no minimum, max declared value of $50,000, 3 day turnaround Unlimited WalkThrough: $150/card + 1% fair market value, no minimum, unlimited max declared value, 3 day turnaround CGC also offers the additional option of getting Sub-Grades where the card is assigned separate grades for centering, corners, edges, and surface in addition to its overall grade