All 18 ‘Detective Pikachu’ Cards Revealed in Their CG Glory! By: Water Pokémon Master Posted 2 months ago to TCG 47 comments All cards from the upcoming Detective Pikachu mini set have officially been revealed by Pokemon! Pokemon confirmed there will be several additional promo cards released to celebrate the movie. Between the 18-card set and the promo cards, more than 25 cards will be released. Pokemon.com will reveal how to get the promos in the coming weeks. The Detective Pikachu mini-set will release through various Detective Pikachu promo products starting April 5th in the U.S. and March 29th in some international countries. Each booster pack will contain four cards; each card in the set is holographic.