>>37824804Not that guy but
1. Ghost Pokémon have genders and can breed—even with Ditto. Even if ghost types were dead (and they’re not) a Ditto wouldn’t be able to die and resurrect itself to breed. Therefore, ghost types must have a biological reproductive system that Ditto can copy.
2. Alolan Marowak is not an actual spirit like we see in the Gen 1 games—it gained the ghost typing through its ritual dances. So, we know that ghost type abilities don’t have to come from death