"Considering it has been nearly 7 years since the game originally released, it seems highly unlikely that Level-5 will bother porting it over. It is a shame, as Yo-kai Watch was really an excellent alternative to Pokémon."
If the exclusive DLC doesn’t show up, you likely have a region mismatch. The “JPN” DLC will not work with a USA base game. You must have the Japanese base NSP. yokai watch 4 purapura switch nsp jpn dlc up exclusive