The most critical fix. In v1.0, saving your game in the outer boulevards of Lumiose City could completely corrupt your save file, forcing you to restart the game. Update 1.5 permanently patches this.
You can use FBI (the CIA installer for custom firmware) to install the patch seamlessly.
: Fixed an exploit where specific Pokémon evolving via Wonder Trade would fail to learn their post-evolution moves properly.
This comprehensive guide covers everything you need to know about the 1.5 update, why decryption is mandatory, and how to optimize your setup for better performance. Why You Need the 1.5 Update for Pokemon Y
If your target keyword includes "eur usa better", you are likely concerned about region locking or file compatibility.
To verify it worked, look at your game list inside the emulator; the version tag next to Pokémon Y should change from to v1.5 . Pro-Tips for a Better Gameplay Experience