I don't know if it's possible but these are my ideas: VPN, Changing where you are on the 3ds configs or using another's region game via Homebrew/CFW
PS: If anyone wants to do some runs I can(I'm noob) I can, I'm in europe but maybe it's possible to play between regions

Only way I see this working is if you get an emuNAND of another region. Then you'll need to make region specific NNIDs.

I will try everything I mentioned + the emunand and I'll come back with answers(I don't really care about NNID, I use carts)

Get freeshop, and download it, that is what I did. (After I bought the game)