: There is no "v1.4 ROM" file. You must obtain the base ROM (v1.0) and then install a separate .cia or .cci update file for version 1.4 through Citra's "Install CIA" menu.
The Version 1.4 update for Pokémon Omega Ruby is the final official patch released by Nintendo to address gameplay bugs and ensure compatibility with online features like the Global Trade Station (GTS) and Wonder Trade. Nintendo Support How to Download the Version 1.4 Update Pokemon Omega Ruby Version 1.4 Download
The demand for "Version 1.4" files has created a vector for cybersecurity risks. As the official 3DS storefront : There is no "v1
Upon starting the game, you should receive an automatic prompt to update. Pokemon Omega Ruby Version 1.4 Download