Japanese *Legendary Heartbeat* (Sword & Shield S3a) booster box was released in July 2020 as a movie-themed Legendary and Mythical Pokémon expansion. The box’s colorful artwork features Celebi, Genesect, Zacian and Zamazenta against a rainbow swirl, hinting at the vibrant holographic foil pattern on the high-rarity cards inside. This set introduced the new “Amazing Rare” foil card type (first in any Pokémon TCG set), giving players and collectors the chance to pull powerful foil variants like Jirachi and Rayquaza. Each sealed box contains 20 booster packs of 7 cards each, giving players new Sword & Shield cards to find while collectors hunt for holo-chase cards. Collectors prize this Pokémon trading card booster box for its unique mechanics and nostalgic movie tie-in, making it a memorable addition to any collection.