How to Get the Namco Museum Arcade Pac Switch NSP Update Working
Open your backup manager (like , DBI , or Awwmi ) to view the installed base game Title ID.
: Use the Goldleaf application by placing the .nro in your /switch folder and the update NSP in a dedicated folder on your SD card root. Launch the Homebrew menu in "full RAM mode" (holding R while launching any game) for the best results.