Japanese Tandemaus S is a shimmering alternative-art card from the 2023 SV4a Shiny Treasure EX set of the Pokémon TCG. It features two adorable Tandemaus on a silver, star-studded foil background — the concentric rings and rainbow starbursts accent Lee HyunJung’s cute illustration. As a “Shiny” variant (denoted by the “S”), this colorless Basic Pokémon (30 HP) card stands out with its glittering holo treatment and even has a simple draw-two attack. Collectors and players alike prize this Japanese trading card for its rare foil artwork and sweet design from the Scarlet & Violet era.