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.
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.
Merchandise
This section is missing one or more images. Please feel free to add any missing images to this section. Needed images can be uploaded to the Bulbagarden Archives. Reason: Image of the Ultranecrozium Z toy
Pokémon Z-Crystal Gacha 2 lineup
The Ultranecrozium Z has been featured in the Pokémon Z-Ring toy line by Takara Tomy; namely as the secret item of the Pokémon Z-Crystal Gacha 2 release.
Bag item
Held item
