Download the safe 0004000E0011C400 .cia patch file onto a PC. Insert your 3DS SD card into the computer.
Depending on how you play, there are a few ways to ensure your version is current: pokemon omega ruby update 14 3ds usa cia r updated
As of April 8, 2024 , official Nintendo online play for the 3DS has ended. While the update was historically required for "Battle Spot," it is now primarily used for bug fixes and compatibility with fan-run servers like Pretendo . Download the safe 0004000E0011C400