The method for downloading the update depends on whether you are playing on original hardware or an emulator:
Depending on your platform, the installation process for the version 1.4 patch varies: Download Pokemon Omega Ruby 1.4
The official patch notes from sources like Nintendo Support and Serebii are concise, stating that "various bugs have been fixed for an improved gaming experience". Specific community-noted fixes include: The method for downloading the update depends on
If you want a experience with Omega Ruby : Download Pokemon Omega Ruby 1.4
In emulators like Citra or Lime3DS , you select "File" > "Install CIA" and choose the update file.