You must use a "Batch 3DS Decryptor" tool. This process rewrites the file into a "Decrypted" state, which allows emulators to read the game data directly without needing external keys.
If you are using a physical 3DS with custom firmware (CFW) like Luma3DS, your console can handle these files natively once they are converted or installed. Download Pokemon Omega Ruby (USA) - 3DS Encrypted
To make this file playable on an emulator, you typically have two paths: You must use a "Batch 3DS Decryptor" tool
The version of Omega Ruby is highly sought after for English-speaking players. Unlike older generations, 3DS Pokémon games are generally multi-language, but the USA region file ensures compatibility with North American save data and DLC. A Note on Performance To make this file playable on an emulator,
If you prefer to keep the file as is, you must find and place the aes_keys.txt file into your emulator’s system folder. This allows the software to "unlock" the game on the fly. Why Choose the USA Version?