Legendary Heartbeat (Japanese: 強化拡張パック 伝説の鼓動Strength Expansion Pack: Legendary Heartbeat) is the name given to the third Japanese subset released during the Sword & Shield Era of the Pokémon Trading Card Game. It is an enhancement of the third main expansion, Infinity Zone. It continues the introduction of Generation VIII Pokémon to the TCG.
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Strength Expansion Pack: Legendary Heartbeat is a subset containing 94 cards that was released on July 10, 2020 in Japan. The set was originally slated to coincide with the release of the twenty-thirdPokémon movie, but the movie was delayed to a later date due to the COVID-19 pandemic. It features the Rogue Monkey Pokémon Zarude, which debuted in the Pokémon Sword and Shield Expansion Pass and the movie. The set introduces a new rarity, Amazing Rare, which features Legendary and Mythical Pokémon. Each booster pack contains 7 cards, including 1 guaranteed Holofoil card.