The Pokemon TCG expansion "Ancient Roar" is a Japanese set that, along with its counterpart "Future Flash," introduces the concept of Paradox Pokémon from the Scarlet & Violet games, featuring new Ancient and Future mechanics. It features cards with unique borders and art styles, with a focus on Ancient Pokémon and fossil-based strategies. The set includes 66 cards, including secret rares, and is available in booster boxes containing 30 packs of 5 cards each.