According to the search results, the rarest Pokemon card is the Blastoise Commissioned Presentation Galaxy Star Hologram card, with only two cards ever made. However, there are other extremely rare Pokemon cards that are highly sought after by collectors, such as the Pikachu Illustrator card, which is widely considered the rarest and most expensive Pokemon card in existence. Other rare cards include the Kangaskhan Holographic Family Event Trophy Card, of which only three have ever been sold to the public in the past twenty years, and the 1999 Pokemon Base Set Shadowless 1st Edition Holo Charizard.