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)

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

I'm from spain and I'm interested on all levels but can't record, also, I think online is not region locked