Pokemon Cards: Unofficial Ultimate Collector's GuideSince the late 1990s, the Pokemon franchise of games, books, comics, cartoons, movies and other merchandise brings in $2. 1 billion a year in revenue. An integral part of the franchise's success for the past 20 years has been the Pokemon Trading Card Game, which has released 2. 1 billion cards all over the world. Since the late '90s starting with the Base Set, the PokEmon TCG has continued printing new sets every year, with 71 expansion sets and