What you see here is a list of Nintendo 3DS demo cartridges. These carts were never intended to reach the public but instead supposed to be destroyed once a promotion was over. Some of these carts do survive however and here's what's known to existPlease note that this list does not include retail carts with a "Not For Resale" sticker slapped on the back. While some/most may consider them NFR's they really are nothing but the retail version and I therefore do not think they belong here.
If you feel you have something to contribute then please email me. I deeply appreciate all the help I can get to complete this task :-)