[Meta thread] Lord Windos' PokeRole Adventure : Celadon City Vandels

[Dragonstrike]

Maybe it was originally design to be a weapon for Team Plasma shenanigans under command of Ghetis, and then Colress simple used as tool to combine Necrozma? I don't really know, it's just a theory. Unless Mew or Windos give us some light (pun intended) around such technology around Windoverse?

Windoverse is basically the nickname I give to this campaign universe

Definitely not.  The DNA Splicers existed looooooonnnnngggg before Team Plasma did.  They had to steal them from the Drayden.  Opelucid's Gym Leaders had been guarding the DNA Splicers for (probably) generations. It's never explained why Drayden had them in the first place, though (other than he's the Dragon Gym Leader).

The events of the Unova games haven't occurred yet as of the Celadon City Campaign (the events of the Kanto games haven't even occurred yet), and the DNA Splicers are an incredibly well kept secret IC.  It's not particularly plot relevant atm, either, so there's not really any need for us to know much about them right now.

The N-Solarizer and the N-Lunarizer also aren't the same item as the DNA splicers. Colress simply invented them towards the end of USUM based on what he knows of the DNA Splicers and Necrozma.