For many 3DS titles, "Update 1.4" (or v1.4) usually refers to a specific patch released by Game Freak to fix bugs or address glitches found in the initial release.
In the context of Pokémon Omega Ruby, updates were primarily released to fix: pokemon omega ruby update 14 3ds usa cia r
If you are playing the USA (Region 'U') version of the game, ensuring your game is patched means you are playing the safest, most stable version possible. For many 3DS titles, "Update 1
Unlike the base cartridge (v1.0) or the eShop version, the v1.4 update includes: If you are playing the USA (Region 'U')
If you are hunting for the file, you need to verify the checksums (like Title ID and Version Number) to avoid corrupted downloads.
Warning: Do not confuse the Update CIA (usually 100-300MB) with the Base Game CIA (1.7GB). The keyword "update 14" specifically means the small patch, not the full game.