>>55948028They did see something wrong with it and so did the Pokémon. That's why they stopped doing it. In the past humans would marry Pokémon and Pokémon would marry humans. Also, I don't think it was just in Sinnoh.
Sinnoh Folk Story 3 says that humans Pokémon used to get married but now don't any more. That means it's not a thing in present day in the Pokémon world. So if you were in the Pokémon world you can't marry a Pokémon because humans and Pokémon getting married is not a thing any more.
