>>52951221To humor you, I broke out my copy of Pokémon Moon, and went to Malie Library. Every single book is the same, US/UM just added the charred page that states Necrozma’s name.
In fact, the main book on the middle of the room, actually mentions “the Beast that brings the dark” aka Necrozma, stealing the light from Alola, casting a “pall on the line of the Kings.” This is just a universe where they successfully wrote Necrozma out of history, because it never left to threaten Alola again, after the Legendaries buried it in Ten Carat Hill.
Necrozma is the source of Z-Power and all Z-Crystals, including the Tapunium Z, cope.