I was really hoping they'd learn a new move or something to allow them to evolve, but they dont. The answer for right now is no clue I haven thought that far ahead yet.
IF
the starter hisuian forms can be made into location based on how their typings are like maybe typhlosion in goldenleaf,decidueye in sherdian and samurott in may be in akuwa town.its just a suggestion though im not a developer so i dont know how things work