Decks I would recommend Penny to be played in: any deck that plays Basic Pokemon Thorton For similar reasons as Penny, Thorton can act as answers to lock situations, like Mawile, by switching your Active Pokemon with a Pokemon in your Discard Pile
Jolteon #4 Jolteon #4 is another fan favorite that brings a high level of liquidity to the secondary market
He manages to figure out Playmaker's strategy, and uses his "Drone" Deck to perform a series of combos to overwhelm Playmaker and seal off his strategy
Also great for out-of-print sealed product where MSRP is irrelevant
The hybrid card frame helps a lot in understanding that those cards have two different colors
Depending on the opponent's choice, that card either forces them to discard a card, which might be revived if it's a monster, or allows its controller to draw two cards and discard one