Hidden Legends

EX Hidden Legends, released in June 2004, is the 21st set of cards in the Pokémon Trading Card Game and the 5th set released by Pokémon USA. Its symbol is a trapezoid with six equally-spaced smaller dots surrounding it. This entire setup is within a solid white irregular hexagon. The Hidden Legends part refers to Regirock, Regice, and Registeel, Legendary Pokémon hidden away in stone structures. This set contains 101 different cards

This set revolves around three concepts: Regirock, Regice, and Registeel, as mentioned above; Jirachi, a Legendary Pokémon with the power of wishes; and Pokémon 4Ever with the presence of Dark Celebi. This set also continues to introduce Pokémon into the card game. In addition to the Pokémon above, Beldum and its evolution line makes its debut.