By scope alone, the Jolina Gisèle Pokémon card collection defies belief. She calls it the largest and most valuable Pokémon card collection to ever exist. Unless some multi-millionaire suddenly comes out of the woodwork and reveals that they own, like, three copies of every rare pocket monster card, Gisèle is probably right. Her collection is certainly bigger than the one that belongs to the Guinness World Record holders.