Like previous versions (1.1–1.4), version 1.5 includes cumulative fixes for older issues, such as the Lumiose City save glitch and GTS communication errors. Installation for Decrypted/Emulated Systems

For users on emulators like Citra or modded hardware seeking "decrypted" versions:

Official patch notes from sources like Serebii and Nintendo Support highlight the following:

Are you encountering a (like a 002-0119 or 005-4222 error)? How to Update Pokémon X and Pokémon Y | Nintendo Support

Fixed a specific issue that caused players to disconnect during Random Matchups and Online Competitions.

Official updates can still be found by searching the Nintendo eShop on a 3DS system. For homebrew users, repositories like hShop often host these files.