Tag Team Collection was released on July 10, 2020 and is mostly composed of cards sourced from the final three of the Japanese Sun & Moon Era, focusing heavily on TAG TEAM Pokémon-GX. It is split into two sets, Set A and Set B, each of which focuses on specific types, and the booster pack art features Mitsuhiro Arita's illustrations of the focal TAG TEAMs from the four main source Japanese expansions. Set A features Grass, Lightning, Psychic, Metal, Fairy, and Dragon-type Pokémon. The pack art for this set has Pikachu & Zekrom-GX from Tag Bolt and Mewtwo & Mew-GX from Miracle Twin. Set B features Fire, Water, Fighting, Darkness, and Dragon-type Pokémon. The pack art for this set has Reshiram & Charizard-GX from Double Blaze and Arceus & Dialga & Palkia-GX from Alter Genesis. Each pack includes 4 cards.
Unlike any of the other Asian expansions localized outside Japan and South Korea, all cards other than Pokémon-GX, Trainer-Rares, and Secret cards in Tag Team Collection do not have rarity symbols. With 609 cards including 200 Secret cards, it is the largest set and includes the largest quantity of Secret cards in any language, surpassing the 100 included in the Japanese GX Ultra Shiny subset.