Nihil Zero is the third set of the "Mega Evolutions" block for Japan. It was released January 23rd, 2026 in Japan. Nihil Zero is the first booster set to be fully based on the video game Pokémon Legends: Z-A (although there have been cards based on Pokémon and characters from the video game in products released prior). The central Pokémon is Mega Zygarde ex, appearing as a Mega Evolution Pokémon ex card. Various other Pokémon and characters from Pokémon Legends: Z-A also appear as cards. Nihil Zero was released in Japan on January 23, 2026, followed by localized releases in Taiwan and Hong Kong on February 6, 2026, and in South Korea on March 13, 2026. Each booster pack contains 5 cards. Each booster box contains 30 packs. Cards released in this set are included in the English Perfect Order expansion. The set's Japanese name, Munikisu Zero, references the Japanese name of Mega Zygarde's signature move, Nihil Light (Japanese: 無に帰す光 Munikisu Hikari). The name also forms the initialism "MZ", which alludes to two important Pokémon Legends: Z-A elements, namely Team MZ and Mega Zygarde.

Each brand new, factory sealed Japanese Munikis/Nihil Zero Booster Box contains 30 booster packs containing 5 random cards each.