The v1.4 update is an official software patch released by Nintendo and Game Freak for Pokémon Omega Ruby and Alpha Sapphire. In the context of 3DS ROMs, a "v1.4 ROM" usually refers to the base game cartridge data (dumped as a .3DS or .CIA file) combined with this specific version update.
: Experience Primal Groudon with its devastating Desolate Land ability, which completely neutralizes water-type moves.
The 1.4 update patch is approximately 250 to 270 blocks in size.
Overview
The v1.4 update file itself is almost always distributed as a .cia file, which is applied on top of the base game. How to Play on PC and Mobile (Emulation)
Nintendo released the 1.4 update to resolve game-breaking glitches and optimize performance. If you play the base version (v1.0) without this update, you risk facing crashes and text bugs that can corrupt your save file. Key Fixes in Version 1.4
To comply with copyright laws, the safest and legal route is to dump your own legally purchased Pokémon Omega Ruby cartridge and download the update directly from the Nintendo eShop servers using homebrew tools like Dumper or GodMode9 .