Go to (or the menu icon on mobile) and select Install CIA . Locate your decrypted v1.5 update file and select it.
This process works identically for and USA regions. Simply ensure you have the correct CIA file for your copy of the game. pokemon x update 15 decrypted 3ds eur usa install
Ensure your update file matches your base game region ( EUR or USA ). While some decrypted files are region-free, matching them prevents save data corruption. Go to (or the menu icon on mobile) and select Install CIA
These updates were originally distributed via the Nintendo eShop, which has now closed for the 3DS. While the update is essential for fixing bugs, downloading decrypted files involves copyright considerations. If you own a physical copy of the game and a modded 3DS, it is possible to dump your own update files from your cartridge or system memory to ensure you have a legal backup. Simply ensure you have the correct CIA file