Undertale-nsp-update-romslab.rar Direct
Use your preferred title manager (such as Tinfoil, DBI, or Goldleaf) to install the update.
Ensure your custom firmware (CFW) is up to date to avoid installation errors. Always back up your save data before applying updates. Undertale-NSP-UPDATE-ROMSLAB.rar
Move the extracted .nsp file to your Switch's SD card. Use your preferred title manager (such as Tinfoil,
