question about the 3DS region

ok, i haven't seen this ask, but if you change the region of the 3ds, say like mine is set to the US and i change it to a EU setting, would i be able to access the EU eshop, or would it lock me to the US eshop?reason i'm asking is for the main fact that there is some demos i would like to get on my 3ds but the demos is in the EU eshop

Yes.
Changing the region opens the E-Shop for that region.

hmm... i have been checking on friends 3ds and seems like the eshop is bare for most other regions >_<