SkullMammothmon #BT6-043 is a Digimon Double Diamond card used in the Digimon Card Game, cataloged at Unknown rarity. Collectors view it as a low-value, niche pick-up with a current market price of approximately $0.06, reflecting limited demand and common circulation. When evaluating collections or budget builds, its presence signals thematic depth rather than investment potential, and any available grading or sales history should be checked for condition-specific deviations.