This patch was required to access any online features, including the Player Search System (PSS), Wonder Trade, and the Global Trade Station (GTS). Key Fixes and Changes
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 Pokemon Y: Update 1.5 [Decrypted] 3DS (EUR/USA)...
Are you encountering a (like a 002-0119 or 005-4222 error)? How to Update Pokémon X and Pokémon Y | Nintendo Support This patch was required to access any online
Increased detection for "unauthorized data manipulation" in competitive play to maintain game integrity. How to Update Pokémon X and Pokémon Y
is the final official software update released for the Nintendo 3DS title. While the eShop has largely closed, game updates like this remain available to download for users who own the software. Update Overview Release Date: April 22, 2015.