>>28878214Yeah that's easy as fuck to implement
Skull most likely will be crooks, but not ""villains"", they're mostly criminals and Guzma just wants to stick it to the man.
Aether will probably have you do errands for them which involves beating up Skull, making them antagonize one another.
Then, "surprise! We were the bad guys all along :^)" will be what Aether says at the game's climax. When they doom Alola, Skull will probably realize their home is in danger, with Guzma realizing he has a chance at redemption. Shit gets resolves, and Guzma's a trial captain.
Really, it's not that hard to come up, and I'm positive GF is going in this direction too. It's probably why Gladion exists too, a sibling of Lusamine using Skull to fight against Aether.