Pokemon Ultra Sun Update 12 Cia Install -

Or just launch the game – version number appears on title screen (lower right).

A CIA file is a format used for installing games and content on the Nintendo 3DS. It stands for CTR Importable Archive and is essentially a packaged file that contains data for the game, including its metadata, to be installed on a 3DS console. CIA files are used for homebrew applications as well as for games and demos distributed outside of the official eShop. pokemon ultra sun update 12 cia install

Cause: Region mismatch or base game is a different version. Fix: Or just launch the game – version number