Ultranecrozium Z

The Ultranecrozium Z (Japanese: ウルトラネクロZ Ultranecro Z) is a type of Z-Crystal introduced in Pokémon Ultra Sun and Ultra Moon. It is a Pokémon-specific Z-Crystal associated with Necrozma which allows it to transform into Ultra Necrozma after fusing with Solgaleo or Lunala, and also allows it to upgrade its Photon Geyser into the signature Z-Move Light That Burns the Sky when it is Ultra Necrozma.

Ultranecrozium Z
Ultranecro Z
Bag Ultranecrozium Z Sprite.png
Ultranecrozium Z
Artwork from Pokémon Ultra Sun and Ultra Moon
Introduced in Generation VII
Generation VII Bag Z-Crystals pocket icon.png Z-Crystals (USUM)

In the core series games


Games Cost Sell price


  Bag item

Can create Ultranecrozium Z held items for the player's Pokémon.

  Held item

  This move effect may be in need of research.
Reason: Can a Pokémon other than Necrozma that is transformed into an Ultra Necrozma use the Z-Move Light That Burns the Sky even if it does not hold an Ultranecrozium Z?
You can discuss this on the talk page.
In battle

Allows Necrozma to transform into Ultra Necrozma after using Ultra Burst and upgrades its Photon Geyser into the special Z-Move Light That Burns the Sky.

A Pokémon transformed into Ultra Necrozma cannot use any other Z-Move than Light that Burns the Sky, even if holding the appropriate Z-Crystal.

Unaffected by item negating effects (such as Embargo and Klutz). Item manipulating effects (such as Trick and Fling) cannot remove a Z-Crystal from a Pokémon.

Rayquaza cannot Mega Evolve if it holds a Z-Crystal.

Outside of battle

A held Ultranecrozium Z is automatically removed if the Pokémon is traded between players.


Bag item

Games Description
It's a crystal that turns Necrozma fused with Solgaleo or Lunala into a new form.

Held item

Games Description
This is a crystallized form of Z-Power. It upgrades Necrozma's Photon Geyser to a Z-Move.


Games Method
USUM Mount Lanakila (dropped by Necrozma when caught)


This is artwork of the Ultranecrozium Z as seen on the official Pokémon Global Link.

Ultranecrozium Z

In the manga

An Ultranecrozium Z in Pokémon Adventures

Pokémon Adventures

Sun, Moon, Ultra Sun & Ultra Moon arc

An image of an Ultranecrozium Z appeared in Transcend!! Ultra Necrozma!, where it was revealed to have been one of the aura-related items collected and researched by the Ultra Recon Squad. When held by Dulse, it had caused him to get drawn to Necrozma, who absorbed the item and used it to transform into Ultra Necrozma.

In other languages

Language Title
Chinese Cantonese 究極奈克洛Z Gaugihk Noihhāklok Z
Mandarin 究極奈克洛Z / 究极奈克洛Z Jiūjí Nàikèluò Z
  French Ultranécrozélite
  German Ultranecronium Z
  Italian Ultranecrozium Z
  Korean 울트라네크로Z Ultranecro-Z
  Russian Ультранекрозиум Z Ul'tranekrozium Z
  Spanish Ultranecrostal Z

External links

  This item article is part of Project ItemDex, a Bulbapedia project that aims to write comprehensive articles on all items.