Pokemon: Factory Sealed Pocket Monsters Gym Heroes Booster Pack Booster Box Prices Pokemon BREAKthrough Pokemon Cards English Pokemon Cards Collectors Alchemy Pokmon Gym Challenge Booster Pack Pokemon Mercari Pokemon Gym Challenge 1st Ed. Sealed Booster Box sold at auction on 25th September Bidsquare Gym Challenge wasn't just about cool characters. It was about demand creation across multiple cards at once. A 2000 release that felt entirely new. #PokemonTCG #GymChallenge #TradingCardGame