3. “Backless Blastoise” – Commissioned Presentation Galaxy Star Hologram

This isn’t a normal Blastoise Pokémon card. What makes this one so valuable is the lack of any printing on the side opposite to the art, hence the name “Backless Blastoise.” Really, the card was never meant for public consumption, as it was part of a test run made by Wizards of the Coast. The tentative printing happened in ‘98, before the launch of the series in the US—and before anyone knew the franchise would explode in the way that it did.