Lillie doesn't want to deal with it so steals UB-01 and goes to Kukui explaining this. Kukui realizing how fucked up it is probably tries to get dirt on Aether's dealings with Skull hence you and Hau. You're basically Kukui's spies and probably end up pawns still in the Brainy''s Bunch (see what I did there ;)) scheme of challenging the very PokeGods themselves.
Now you are probably asking, "Dude wtf" but let me finish it'll make sense. Colress, Lusamine and the like are researching about Pokemon, their powers, their origins, their life cycle and how they affect our own to do one thing: bring back their
Mom.It makes sense. If this a big scary family and Wicke is more like Colress' little sister instead of the mother (unless she is which I could kinda see and appreciate his tastes) it's why they are searching so hard looking into every. kind. of. angle. If they can find a way to gain control over life and death, soul and spirit, and the Pokemon that intersect it, they get mom back, be it a ghost pokemon, a fairy pokemon, a hybrid, whatever. It's one of the ultimate goals of alchemy and with AF's staff sporting Z-Crystals (legit Lusamine has one right on her chest) why couldn't they have the means to make them, IF NOT turn them into synthetic creatures?
I mean, Rocket created Porygon, Ditto and Mewtwo thanks to funding crazy scientists, and I think Colress helped to develop Genesect (which is a pokehybrid of a fossil pokemon and modern tech) why couldn't his family have the means to created Type: Zero and the UBs? XD: Gale of Darkness focused on the creation of pokemon like UB: soulless fighting machines. They legit don't even know UB has a soul or whatever and it makes sense if you want a fighting machine to take on legendaries that won't puss out or suck make a Pokemon from scratch with the power of a legendary (the power Zygarde infused into Pokeium to make them a base-substance to make Z-Crystals) that only has the fight response.
