The N-Lunarizer (Japanese: ネクロプラスルナ Necro Plus Luna) is a Key Item introduced in Pokémon Ultra Sun and Ultra Moon. It can be used on Necrozma to fuse it with Lunala into Dawn Wings Necrozma or to separate Dawn Wings Necrozma into its constituent Pokémon.
It was developed by Colress on behalf of the Ultra Recon Squad as the Colress Machine No. 1199 (Japanese: アクロママシーン １１９９号 Achroma Machine No. 1199).
While the player does not have a Dawn Wings Necrozma, the N-Lunarizer can be used to fuse Necrozma with Lunala to become Dawn Wings Necrozma.
While the player has a Dawn Wings Necrozma, the N-Lunarizer be used to separate it into Necrozma and Lunala. All properties of the Lunala will be retained.
The N-Lunarizer can only fuse together one Necrozma and Lunala at a time. In order to fuse a Necrozma with a different Lunala, any existing fusion must be undone.
Colress Machine No. 1199