>>33566687>the beast that stole all heaven’s light.>The island guardians fought against it,>but in the end they lost the fight.>Then did the beast that brings the dark>cast its pall on the line of kings.>So would the beast that had won>mark the path for all such finished thinNot one word of that mentions UBs
Not one word of that implies you can "lose" UB status
The rest is your headcanon
The Necrozma dex entry explicitly states it isn't.
The game mechanics that effect UBs do not effect it.
The NPCs who tell you what UBs are and are right 100% of the time say it is not.
I'll repeat, please post any evidence it is a UB and not a story that doesn't mention UBs in any way shape or form. It doesn't even mention another dimension or wormhole for fuck sake