Ensure your Switch is running a custom firmware environment How good is the fan translation for Yo-kai Watch 4? - Reddit.
The demand for a ROM of this specific version boils down to three painful words for Western fans:
: A major four-player local and online co-op mode based on the fan-favorite Yo-kai Watch Blasters spin-off.
Which you plan to use (Ryujinx, a Switch fork, etc.)? Your PC's hardware specs (Graphics card and RAM)?