none except Mario games
Yes, the 3DS will be backwards compatible with the DS, but the standard DS games will not be in 3D.
As long as it's a Nintendo DS system, then yes, you can play Pokemon SoulSilver Version on the original Nintendo DS.
Yes, all you need are the games and 2 Nintendo DS or DSi.
Well really it depends what console you've got (ps3, xbox, Nintendo ds, psp etc.)
PLASTIC AND METALL PROBABLY
The Nintendo 3DS does not have PictoChat so you cannot chat with a person with a DS.
No, you cannot get Snap Chat on a Nintendo DS. The DS cannot run unauthorised code, only code that Nintendo has allowed.
Only with Pictochat
Yes you can play Nintendo DS games on a Nintendo ds lite.
Yes, you can use Pictochat to chat from a Nintendo 3DS to other DS devices.
Nintendo DS and Nintendo DS Lite support Nintendo DS games and Game Boy Advance games. Nintendo DSi and XL only support Nintendo DS games.
no you can only use Nintendo games on Nintendo ds/Nintendo ds lite.
Yes. Nintendo ds games are not region coded.
no but you can play Nintendo advance games on a Nintendo ds
Yes, the PictoChat can allow the Nintendo DS and DSi to chat together
No a PSP
A Nintendo dsi can do the same things a ds can: play games, picto chat, etc. and it also has 2 built in cameras. You can use the web and can download games as well