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After defeating Necrozma, Phyco and SolieraUS/Dulse and ZossieUM will arrive with a Poipole in tow, telling them that it is interested in joining them. The player can accept or refuse; in the latter case, they can always return to Ultra Megalopolis to pick it up again.
It only appears in Pokémon Ultra Sun and Ultra Moon.
Geography
Megalo Tower is a tower in Ultra Megalopolis which emits blinding light. It has an elevator that leads to the top floor, and a staircase leading to a platform at the top. It is here where the player witnesses Necrozma transforming into its Ultra form before battling it.
A colored background means that the Pokémon can be found in this location in the specified game. A white background with a colored letter means that the Pokémon cannot be found here.
Special encounters
Ultra Necrozma appears using the light it got from being fused with Nebby and undergoes the effects of Ultra Burst. It cannot be caught or fled from and must be defeated. It is coded to never be Shiny.
Megalo Tower first appeared in Arrival at the Scientific Megalopolis. It serves as the headquarters for the Ultra Recon Squad while also providing artificial light for Ultra Megalopolis. After a Stakataka appeared at Ultra Megalopolis, looking to fight with Necrozma, Zossie took Sun and Moon to Megalo Tower to hide, as they had no way of fighting it. Stakataka grabbed Sun, forcing Moon and Lunala to fight it to rescue him. While they battled, Soliera appeared, revealing that she deliberately lured Stakataka to them so she could see how the bonds between a Trainer and their Pokémon could lead to a way of restoring light to Ultra Megalopolis. After Sun had succeeded in subduing Stakataka, Necrozma emerged from the tower, having reacted to Lunala's presence.
