4. Japanese Promo Card – Family Event Trophy – Holo Kangaskhan
One of the rarest Pokémon cards in the world, this Kangaskhan was only given out to select winners during the Parent/Child Mega Battle tournament held in Japan in 1998. As the name suggests, this was a contest featuring families competing against one another. Only the families that achieved a certain number of wins could get this rare card. According to PWCC, only 46 of these cards have ever been assessed by the PSA. This particular promo card is rated a perfect 10 by the PSA, the first time one of these rare Kangaskhan family event cards has received such a rank. This helps explain the high price tag it earned at auction
