Rock Guard is a Rare card from the BW8: Spiral Force set, identified by the number #050/051. As of now, it holds a market value of $0.99, appealing to collectors interested in unique defensive strategies within the Pokémon Trading Card Game. Its rarity and specific gameplay functions make it a noteworthy addition for those building competitive decks or completing the set. Grading data is limited, reflecting its niche status in the market.