This update is the standard base for many popular ROM hacks, but installation methods vary:
If your CIA version of Ultra Moon is not working with the v1.2 update, community consensus from r/3dspiracy suggest the following fixes: How to Update Pokémon Ultra Sun and Pokémon Ultra Moon
: When creating your own CIA files from a game cartridge using tools like GodMode9, you might encounter a "Build Failed" error. The most frequent cause is insufficient space on the SD card. If space isn't the issue, try dumping your cartridge as a .3ds file first, then converting that to a .cia . pokemon ultra moon update 12 cia work
(Optional) Open the homebrew app, select Titles , scroll to Pokémon Ultra Moon (Update), press 'A', and choose Delete Title and Ticket . Step 3: Clean Install via FBI
: For an update to work, the CIA of the update must strictly match the region of the base game (e.g., a USA update for a USA base game). Mixing regions often results in the system failing to apply the patch, even if both files are successfully installed on the device. Corrupted Data or Bad Dumps This update is the standard base for many
If the update still won't stick, your CIA may be a "bad dump" with incorrect internal version numbers. Trusted community tools like hShop provide region-free updates that are verified to work. What’s Actually in the 1.2 Patch?
Ensure your game and the update .cia share the same region (e.g., both USA or both EUR) to avoid "refusal to update" errors. (Optional) Open the homebrew app, select Titles ,
This update primarily addresses technical glitches that hindered competitive and online play:
Place the .cia file in the "cia" folder on your SD card root. FBI Installation: Open FBI on your 3DS. Navigate to SD > cia . Select the update file and choose "Install and delete CIA" . 3. Troubleshooting Common Issues