One of the biggest headaches for collectors is region locking. A Japanese New 3DS LL cannot play an American Pokémon X cartridge. But with a "Region F" CIA, those walls disappear.

If you want a single file that includes the game + update 1.5, you need HackingToolkit3DS (Windows) :

Not anymore. Nintendo’s update servers for 3DS are offline. The only method is manual CIA installation via FBI. The “World CIA” method is now the method.