This 20th Anniversary Special Pack featuring M Slowbro EX and Surfing Pikachu represents a significant moment in Pokémon history, marking two decades since the franchise's inception in 1996.

As a limited edition release, its unopened condition greatly enhances its appeal, capitalizing on the well-established demand for both nostalgic and competitive cards within the Pokémon Trading Card Game community.

The pack's rarity is compounded by its exclusive nature, as Japanese releases often showcase superior quality in printing and packaging, making this item particularly desirable in the collector market.

Given the typical prices for similar anniversary collectibles, the current ¥600,000 bid reflects a fair valuation for such a pristine and historically relevant piece.