As of 2023, Nintendo fully shut down the 3DS eShop. You download official updates via the "Update Now" button on the home menu unless you previously downloaded them. However, if you delete an update or buy a used cartridge, the official update servers still work for existing title updates (but not new purchases).
The proper way to update is:
Alternatively, search for "Pokémon Omega Ruby Update" in the Nintendo eShop and download it manually. How to Install CIA Update (Custom Firmware) pokemon omega ruby update 14 cia download install
Users obtain the specific Update 1.4 CIA file compatible with their game's region (USA, EUR, or JPN). As of 2023, Nintendo fully shut down the 3DS eShop
Ensure at least 300 free blocks on your SD card. The proper way to update is: Alternatively, search
Always use Checkpoint or JKSM to back up your save file before modifying game data. ❓ Troubleshooting Common Issues
Launch the game; a prompt should appear asking you to update. Select "Update Now" or press Y to begin the download.