yes
Yes, the PictoChat can allow the Nintendo DS and DSi to chat together
The Nintendo 3DS does not have PictoChat so you cannot chat with a person with a DS.
play games and chat.
No, you cannot get Snap Chat on a Nintendo DS. The DS cannot run unauthorised code, only code that Nintendo has allowed.
Yes, you can use Pictochat to chat from a Nintendo 3DS to other DS devices.
you all ready can with any DS
First you need at least two nintendos. Then, you go to pictochat on the ds menu. Make sure you are both in the same chat room. Then chat away. NOTE: You do not need wifi.
Sadly no. The connection doesn't go far.
on the main interface of the ds click on picto chat or ds download play
Only with Pictochat
No, it is illegal but you can use wi-fi connection on some DS games to chat to your friends and connect.
You can't, because Pictochat is not available for the 3DS.