This represents the final software patch officially deployed by Game Freak and Nintendo for Pokémon X .

The official final update for is Version 1.5 , released by Nintendo on April 22, 2015 . While later dates like 2021 might appear on third-party hosting sites, these typically refer to the date the file was uploaded or "decrypted" for use with emulators, rather than a new content update from Game Freak. Pokémon X Update 1.5 Overview

: Some ROM hacks or randomizers require the base v1.0 version to function correctly and may crash if the v1.5 update is applied apply this update specifically to the Citra emulator or to a physical 3DS? FAQ - 3DS Hacks Guide

" refers to a specific technical configuration for playing the 2013 Nintendo 3DS titles Pokémon X and Y

He injected it into his old European 3DS—a beat-up blue console with a cracked hinge and a Pokémon X cartridge that hadn’t been ejected since 2014. The update installed in 0.7 seconds, faster than any official patch.

The decrypted CIA has invalid signatures for a real 3DS. Fix: In Luma3DS config, enable Enable game patching and disable signature checks. Or, use GM9 (GodMode9) to convert the decrypted CIA to encrypted before installing.