yes, emulators are allowed and they do indeed exist. Its a process of moving your game to your computer as a CIA. basically you're dumping your Tomodachi Life (LEGIT, NO FREESHOP) and it will become a CIA and you can dump using GodMode9 or FBI. I have a link to the Citra Emulator website. If you even ASK where to find a tomodachi life rom or CIA, you will be banned from their site. Don't pirate please.

Link to Citra: https://citra-emu.org/

there you will find a download and setup and advice and a tutorial on to how to dump your 3DS games. Again they have to be legit copies, not pirated as Citra does not support Piracy.

good job citra piracy bad