My guess would be diseases or oldness, though how do you know when a Pokémon is actually old, besides spending all the years with them?
Oh, but I did forget the existence of Yamask's. Maybe humans who die never get graves because they turn into Pokémon. Sounds like something this world would do.
no subject
Oh, but I did forget the existence of Yamask's. Maybe humans who die never get graves because they turn into Pokémon. Sounds like something this world would do.