What is your base Pokémon Ultra Sun game (USA, EUR, or JPN)?
: Create a folder named cias on the root of your SD card (if it doesn't already exist) and copy the update .CIA file into it. pokemon ultra sun update 12 3ds world cia exclusive
[System UI] "An update is available." ↓ (Launches Game) [In-Game Menu] Displays Version 1.2 (Loop repeats) What is your base Pokémon Ultra Sun game (USA, EUR, or JPN)
To apply the Update 1.2 CIA to your console, your 3DS must be running modern custom firmware (B9S/Luma3DS). pokemon ultra sun update 12 3ds world cia exclusive