For three Energy, you can use Concentrated Fire
When you "flicker" a permanent, it's treated as a new card that just entered the battlefield
It is also worth noting that while Charizard remains the headline on any rarest pokemon card list, Mewtwo sits directly behind it in collector recognition, and in certain eras, particularly the EX and Mega eras, Mewtwo's competitive dominance made it the more culturally significant card game piece
Ironscale Hydra could still see play in a deck looking for a specific type of protection and counter synergy, but it may not be a top-tier choice in a competitive setting
Ghyrson Starn, Kelermorph Illustration by Aaron J
For me, I stuck to a balanced store design with a section for people to play, shelves to buy packs of cards, and a section to display and sell individual cards