A while ago, I was at a brick-and-mortar store (I forget which one tbh), and I saw they had a 3DS or 3DS XL with essentially a library of every demo game ever. When you hit the home button, it would go back to a screen with a screenshot/title card on the top and a "play demo" button on the bottom. You could switch with L/R or by pressing arrows on the touchscreen. Since then I have not seen this anywhere. Most stores have either a Mario game, some have retail carts in there, others have some Trend Savvy thing. I collect not-for-resale 3DS demos (when they show up on eBay and so on) and am really curious if that's some sort of super cartridge, a special demo 3DS, or what. Anyone know?