The universally accepted, safe method is using a (like NUSspli on the 3DS itself or Wii U USB Helper for PC) to fetch the update directly from Nintendo’s archived CDN. Since the eShop is dead, these tools still access the raw files via Title IDs.
Modern fan translations (such as custom language patches) explicitly require the v1.2 data structure to prevent immediate startup crashes. Why Your Ultra Moon Update 1.2 CIA Isn't Working pokemon ultra moon update 12 cia work
By following these steps, you should be able to successfully update your Pokémon Ultra Moon game to version 12 using CIA files. Happy gaming! The universally accepted, safe method is using a
Disclaimer: This guide assumes you have a hacked 3DS (Boot9Strap / Luma3DS). I do not condone piracy of games you do not own. This update is for legal backups or cartridge owners. Why Your Ultra Moon Update 1