Anyone know the best way to grind entralink level / pass powers? There doesn't seem to be much documentation on this feature besides the summaries you get on stuff like serebii or bulbapedia

I wanna get the doubled exp pass power but dunno the fastest way to farm for it, also dont even know if its worth it since it only lasts 3 mins and idk how spammable it is

unrelated conkeldurr pic