Many XCI files found online are encrypted. You may need to use a "3DS Batch Decryptor" tool to make the ROM readable by emulators.
If you have a modded Switch, you cannot run a 3DS ROM directly. You must use an emulator app on the Switch called Limón (Lime3DS).
How To Start a New Save File - Pokemon Omega Ruby and ... - IGN
Many XCI files found online are encrypted. You may need to use a "3DS Batch Decryptor" tool to make the ROM readable by emulators.
If you have a modded Switch, you cannot run a 3DS ROM directly. You must use an emulator app on the Switch called Limón (Lime3DS). pokemon omega ruby 1.4 rom espa%C3%B1ol xci
How To Start a New Save File - Pokemon Omega Ruby and ... - IGN Many XCI files found online are encrypted