If you are having trouble with the update file, I can offer troubleshooting tips for Yuzu or Ryujinx emulator issues.
Yokai Watch 4: Purapura introduces several new features and gameplay mechanics that set it apart from its predecessors:
Typically contains the v1.0 game data straight from physical manufacturing blocks. (Compressed NSP) Compressed Format
This mode allows up to four players (local or online) to team up and take on tough boss battles, a highly requested feature absent from the base game.