Holon Research Tower

Holon Research Tower is the sixth main set of the Japanese PCG era, the counterpart of EX Delta Species, themed around the Holon laboratory and Delta Species Pokémon with altered types. The set has 86 cards and focuses on the δ Delta Species mechanic, Holon's Pokémon that also work as Special Energy, and the Holon Energy GL, FF and WP cards. Among the most characteristic cards are Mewtwo δ, Rayquaza δ and δ Eeveelutions such as Flareon, Jolteon, Vaporeon and Umbreon, while the Gold Star Groudon, Kyogre and Metagross set the highest collector tone.