Special events and event-exclusive Pokémon distributions require your game to be patched to the newest version to receive them via the internet. Why Decrypted 3DS Updates are Required
Note: Mixing a USA base game with an EUR update file will cause the emulator to ignore the patch, resulting in the game remaining at version 1.0. How to Install Pokémon Y Update 1.5 on Citra pokemon y update 15 decrypted 3ds eur usa link
Resolves critical glitches that could cause the game to freeze, specifically in certain areas of Lumiose City or during specific trainer battles. Released on , version 1
Released on , version 1.5 serves as the terminal update for Pokémon X and Y. While it doesn't add new Pokémon, it provides critical fixes for the competitive and casual player base alike. He even joined online battles and traded Pokémon
Days went by, and John continued to play Pokémon Y without any issues. He even joined online battles and traded Pokémon with his friends, who were all oblivious to the fact that he was playing on a decrypted update. But, one evening, as John was about to log off, his 3DS suddenly displayed a warning message: "Your console has been detected as modified. Online features will be disabled."
A CIA file is a "CTR Importable Archive." It is the standard format used to install software directly onto the 3DS home menu via tools like FBI.