User blog comment:GouenjiShuuya'123/3DS Friend Codes/@comment-5498308-20121013010325/@comment-4517877-20121013040633

A DS that lets you see what's on your screen in 3D mode, but you can adjust the 3D meter to 2D/as much or little 3D-ness as you want, if you know what I mean :P

Also, there are many other games that can only be played on the 3DS exclusively.

I'm not very good at explaning but I hope that this helped~! You can search on the web if you're not sure what I'm talking about :)