20-year-old Swiss resident Yolina Giselle, who calls herself the "Pokémon princess," has collected around 60 thousand Pokémon cards, worth an estimated £90 million. She began collecting them at the age of seven and now plans to sell her collection, The Telegraph reports.

The collection is kept in a secure vault in Switzerland and was first shown to the public in April 2026 in a James Bond-style video. The collection's release sparked controversy among fans: some doubted the story's authenticity, while others speculated that Gisele's image could have been created by artificial intelligence. To dispel the rumors, she gave an interview to Tatler magazine, posing with the cards against a helicopter.

According to Gisele, her passion began as a child in a Swiss village, where exchanging cards helped her make friends. Her father, entrepreneur Urs Gisele, supported her, calling the collection "a life's work" and his daughter's legacy—he says the family preferred to invest in rare cards rather than yachts or jewelry.

One of the most valuable cards in the collection is a shadowless Charizard, which could be worth up to £740 thousand. If the collection is confirmed, it would surpass the current Guinness World Record of 48 339 cards held by the Gray brothers of Great Britain.