EX Holon Phantoms is the second expansion of cards set in Holon, this time based just south of the city around which EX Delta Species was based. Because of the more natural habitat, fewer of the Delta Species Pokémon are dual-type. The set includes cards from the Japanese set, Holon Phantom, as well as cards from Japanese half decks, several promotional cards, and cards from the Japanese Mew Gift Tin.