Opening a Primarina GX Premium Collection Box of Pokemon Cards! What makes certain Pokmon cards so expensive? The Most Expensive and Rare Pokemon Cards, Ranked by Pokemon Card Value Primarina is such a good card design and might be the best ex in the new set. I made the deck to try out my shiny articuno and it turned into a pokemon battle pack and primarina stole the spotlight. The Most Expensive and Rare Pokemon Cards, Ranked by Pokemon Card Value