Ultranecrozium Z

The Ultranecrocium Z is a Z-Crystal exclusively for Necrozma Moves this Z-Crystal can upgrade:

• Photon Geyser --- Light that Burns the Sky Special: Only Necrozma can use it, if a Dawn Wings Necrozma or Dusk Mane Necrozma uses it, they become Ultra Necrozma using the Ultra Burst.

Moves, abilities or items like Embargo, Klutz or Trick can't make a Pokémon drop the Z-Crystal that it's holding.