Blastoise from the first expansion pack of the Pokémon Card Game is particularly popular among the old back cards, and its rarity means it commands a high price. [Reasons for Popularity and Features] 1.Rarity as an Early Card: This card was released early in the Pokémon Card Game, making it highly valued among collectors. 2.Powerful Performance: It was known as an extremely powerful card under the early rules, and its Evolution ability, which replenishes Water Energy from your hand, was so powerful even on its own that it was later designated a "Hall of Fame" card (with usage restrictions). 3.Charming Character: Blastoise is the final evolution of the popular original starter Pokémon, so its popularity as a character is also one of the reasons for its popularity. 4.Attractive Illustration: The official illustration by illustrator Ken Sugimori is used, depicting Blastoise's impressive appearance.