Amazon.com: Gym Heroes Pokemon Cards 2000 Gym Heroes Pokemon Cards Price Guide Sports Card Investor Top 10 EXPENSIVE Gym Heroes Pokmon Cards! It's been a long 8 months but I've finally completed my Gym Heroes collection! Now on to collecting the rest of the Prime's. : r PokemonTCG The Ancient Mew card is one of the most unique and sought after Pokmon cards ever created, largely due to its limited release, mysterious design, and nostalgic value. First introduced as a promotional