To update to version 1.5 , you can still use official Nintendo services on original hardware or manual installation methods for emulators. This update, released in April 2015 , is highly recommended as it fixes several bugs and was originally required for online features. Official Update Methods (3DS Hardware)
(Link 1) (Link 2)
The 3DS was famously region-locked. However, when it comes to updates and decrypted files, there are two main versions: pokemon x update 15 decrypted 3ds eur usa verified
Let me know what you’re actually trying to do (play on Citra, update a real 3DS, etc.) and I’ll give you legal steps. To update to version 1