A reversal foil variant of Devolution Spray appears in the BW Black Star Promos line as card #019, classified at rarity . It functions as a promotional trainer card for the Pokémon Trading Card Game and is of interest to collectors completing Black & White promo runs. Current market value is listed at $0.00, which typically indicates very low demand or lack of recent sales rather than intrinsic playability. Grading and recent sale data should be consulted for precise condition-based valuation.