3DS / 2DS with Custom Firmware (Luma3DS + FBI)
Insert the SD card back into your 3DS and launch the FBI application from the home menu. pokemon ultra sun update 12 cia install
If the version number hasn't changed, you may have installed the update for "Pokémon Ultra Moon" by mistake, or the CIA file was corrupted. Re-download the file from a trusted source. 3DS / 2DS with Custom Firmware (Luma3DS +
Choose (this saves space by removing the installer after completion). pokemon ultra sun update 12 cia install