Insert your 3DS SD card into your computer. Copy your Pokémon X base game .cia file and the V1.5 update .cia file into a folder named cia on the root of your SD card.
If you are using the Citra emulator on a PC, the process is similar but within the emulator's interface. You would go to File -> Install CIA... and select your update file after installing the base game. pokemon x 15 cia updated
Restores the "feeling of wonder" in the Kalos region with modern performance updates. Insert your 3DS SD card into your computer
This is the most common method for those wanting to play the game on original hardware. You would go to File -> Install CIA
Pokémon X is a role-playing game developed by Game Freak and published by Nintendo for the Nintendo 3DS. The game is part of the sixth generation of Pokémon games and takes place in the Kalos region.
The Pokémon X base game CIA file and the v1.5 Update CIA file (or an all-in-one bundled CIA). Step-by-Step Installation Guide