If chainsaw did the Hisui idea the MC would be alone in the past and isn't allowed to meet any legendary pokemon in order to avoid a time paradox. He also couldn't catch the hisuian pokemon he impregnates.
But, what if chainsaw did go through with the idea, and came up with arceus being like "you may catch the hisuian pokemon you impregnate" or smth? like, give the MC protection from any paradox or smth?
I think I can make this work after the MC goes back to get Enamorus, maybe now that he's time travelled once there will be less risk the second time around so he can afford to fuck more mons/girls