Well here's the thing. You need a hacked 3ds to use this stuff. If you already hacked your 3ds you really shouldn't need anyone's help atleast this much. If you haven't hacked your 3ds start here https://3ds.hacks.guide/ . There's really no way for us to do this stuff for you, we can only point you to the right tutorial and help if you get stuck (I mean I guess you could send someone your 3ds but that's a lot of work, but if it's what you want to do you can try for that)
This is an improper venue for this kind of thread. If you're looking for a hacking service in your area, I suggest searching in the Trading section, failing that you can post a thread there, or you can simply do it yourself - it's pretty fool-proof and the risk is minimal. I'll be closing this thread now, since when it comes to modifying copyrighted software, only you yourself can do it legally - you can't and shouldn't involve a third-party asking it to provide you with a modified ROM, that'd constitute piracy.