Pokémon TCG: EX Delta Species (Japanese: ホロンの研究塔Holon Research Tower) is the name given to the eleventh main expansion of cards from the EX Series of the Pokémon Trading Card Game. It is the sixth main expansion from the PCG Era of the Pokémon Card Game in Japan. The set continues to feature Generation III Pokémon, Pokémon-ex, and Pokémon ☆ in the card game.
From the research labs in the tower of Holon comes a revelation that will thrill anyone who trains and collects Pokémon: there's a brand-new species of Pokémon! In EX Delta Species, players will share in the discovery of these rare and unique Dual Energy Pokémon, as well as experiment with cool new Holon Energy that will make Pokémon Delta Species even more powerful! Are you ready to put the new Delta Species to the test?
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EX Delta Species is the name given to the eleventh main expansion of the EX Series of the Pokémon Trading Card Game. In Japan, it was released as Holon Research Tower, the sixth expansion in the Pokémon Card Game PCG Era. It is based on Pokémon Ruby and Sapphire, featuring Generation III Pokémon. The English expansion was released on October 31, 2005, while the Japanese expansion was released on October 28, 2005.
EX Delta Species introduced δ Delta Species, a type of Pokémon, and Holon's Pokémon, which could also double as Special Energy cards. The expansion was set in the Holon Research Tower, home of scientists who conduct research on Mew and strange new Pokémon. These Pokémon have been altered by a wave of electromagnetic radiation produced by an experiment gone awry at Holon labs. The result was a new species of Pokémon called the Delta Species. These new Pokémon possessed different types than their usual species.
Delta Species Pokémon had "δ Delta Species" between the name and HP, had double helix on the border of the artwork window, and the evolution box featured a δ design. Rare Holo cards for Delta Species Pokémon featured a plain "refractor" Holofoil on the Pokémon and the card border. Reverse Holofoil featured the same "refractor" Holofoil on the background of the artwork. Reverse Holofoil versions of the Rare Holo cards were updated to having gold foil HP text.