Yes, the 1.2 update is the official, final patch released by Nintendo. 3. Will this break my game save?
Resolved an issue where the move Ion Deluge (which changes Normal-type moves to Electric-type) would sometimes fail to function correctly.
Be aware that updating to v1.2 renders any Battle Videos saved in previous versions (v1.0 or v1.1) unplayable. Installation for 3DS & CIA Users pokemon ultra sun update 12 3ds world cia
Fixed a bug where using the moves Curse , Forest's Curse , Power Trick , or String Shot could cause the game to freeze during Live Competitions or QR Code events.
Unlike traditional major game updates, version 1.2 uses the same underlying battle video engine structure as version 1.1, meaning your saved battle replays will not break or corrupt upon updating. Understanding Technical Specifications Yes, the 1
Optimizes general software stability for "Extended RAM" games like Ultra Sun, which natively force older 3DS models to drop background menu functionalities to run the heavy game engine.
Here’s a sample post you could use or adapt: Resolved an issue where the move Ion Deluge
Play legally – buy a physical or digital copy of Pokémon Ultra Sun, then update via Nintendo’s servers. If you have a modded 3DS, you can still install safely, but avoid shady downloads.
A update is universally configured to bypass these hardware checks.
Once you have the .cia file:
Before you can install the 1.2 update CIA file, you must have a properly set up custom firmware (CFW) environment on your 3DS. Here is what you need: