Man... your work on the NDS Cheat database is amazing. That said, is there any chance you might be looking at the 3DS cheats? They appear to be in sore need of some attention from someone with your degree of dedication. I haven't been able to get a single one working for me (to be honest i don't even know where to start).
Maybe look here?
https://github.com/FlagBrew/Sharkive/wiki/3DS-games-in-the-database
Don't worry is just cheats, not game roms and the cheats are just txt files.
You may want to update Luma 3DS to the latest version if cheats are not working. Version 10.0.1 is infamous for making cheats stopping working for example.