Travel back to the experimental world of Holon Research Tower (ホロンの研究塔) — the Japanese Pokémon TCG expansion released October 28, 2005, equivalent to English EX Delta Species. This PCG-era set revolutionized the game with the introduction of Delta Species Pokémon (altered types and attacks due to Holon's electromagnetic research), the iconic Holon staff trainers, and the ultra-rare Gold Star chase cards that defined high-end collecting in the EX Series. A cornerstone for vintage enthusiasts, this set boasts scarcity (especially 1st Edition prints), stunning artwork, and enduring investment appeal in the Holon block.