the correct region update CIA for Ultra Sun (not Ultra Moon).
For users on custom firmware (CFW), installing the update via CIA requires specific considerations:
Some advanced users prefer GodMode9 over FBI for its additional verification.
: Install Custom Firmware (CFW) if you haven't already. As noted in GBAtemp: Install CFW by following https://3ds.guide → You will have permanent access to homebrew and can update to the latest firmware . With CFW installed, you can safely update your system firmware.
Make sure you install the update matching your game region . pokemon ultra sun update 12 cia install
file. (Ensure the update's region matches your game's region—e.g., USA update for a USA game). 539 blocks (approx. 67 MB) of free space on your SD card. Step 1: Transfer the CIA to your SD Card Turn off your 3DS and insert the SD card into your PC. Create a folder named on the root of your SD card if it doesn't already exist. Pokemon_Ultra_Sun_Update_v1.2.cia file into this Safely eject the SD card and reinsert it into your 3DS. Step 2: Install via FBI from your 3DS Home Menu. Navigate to your update file and press Install and delete CIA
Copy your downloaded Pokémon Ultra Sun v1.2 Update.cia file directly into the cias folder.
This usually means your CFW is outdated. Update your Luma3DS boot.firm file to the latest version and try again.
Safely eject the SD card from your computer and reinsert it into your 3DS. Step 2: Install via FBI Power on your 3DS console. the correct region update CIA for Ultra Sun (not Ultra Moon)
Power on your 3DS and launch the application from the HOME Menu. Select SD from the main menu. Navigate to the cias folder. Highlight the Pokémon Ultra Sun v1.2 update CIA file.
The 3DS Hacks Guide () provides an authoritative, step-by-step walkthrough for installing CFW on any 3DS model. The guide notes that Install CFW by following https://3ds.guide → You will have permanent access to homebrew and can update to the latest firmware. Then you can play Pokémon Ultra Sun .
: System asks to update firmware before launching the game.
Note: For maximum stability, always try to use the Nintendo eShop update method if you have a non-pirated, legitimate copy. As noted in GBAtemp: Install CFW by following https://3ds
You must source the Pokémon Ultra Sun Update 1.2 CIA file. Make sure the region of the update file (USA, EUR, or JPN) matches the region of your base game, or the patch will fail to apply. Step-by-Step FBI Installation Guide
(Luma3DS).
How to Download and Install the Pokémon Ultra Sun v1.2 Update CIA