It ensures protection against the infamous "Lumiose City glitch," which could previously corrupt save files if the game was saved in the outer ring of the city.
While specific details about Update 15 might be scarce, updates for Pokémon X typically include: pokemon x update 15 cia better
Technically, Update 15 is the most stable version of Pokémon X available. It fixes memory leaks present in version 1.0. In the CFW community, it is better to run the game as a CIA with the update merged, rather than as a physical cartridge. It ensures protection against the infamous "Lumiose City
If you're looking to update your Pokémon X game or find out what's new in hypothetical or real updates: In the CFW community, it is better to
If using an emulator like Citra , you can install the .cia update by going to File -> Install CIA... and selecting the update file.