The 3DS uses the 'same Wi-fi', it support WPA and WEP encryption, which the DSi supported too, but the DS could only use WEP.
No, there won't be.
There are several types of Nintendo DS systems ranging from the Nintendo DS, Nintendo DS Lite, Nintendo DSi, and Nintendo DSi XL. The newest version of the Nintendo DS is the Nintendo 3DS and Nintendo 3DS XL.
Yes, the Nintendo 3DS (as well as the 3DS XL and 2dS) has its own 3DS games that will not work for the Nintendo DS, Nintendo DS Lite, Nintendo DSi, and Nintendo DSi XL.
Yes, the Nintendo DSi XL has WiFi and can connect to the internet.
You can't trade JUST you DSi system in for a 3DS system anywhere.
Indeed-- If you have WiFi with a DSi you can go on the internet.
The Nintendo DSI, DSI XL, 3DS, 3DS XL, New 3DS, New 3DS XL, and 2DS all take pictures
Yes. The DSi and the 3DS use the same charge cable. As well, the DSi charge cable can be used to power the 3DS' charging cradle too.
It will fit, but it will not work on the Nintendo 3DS
No. A DSI cant use a 3DS charger.
Nintendo 3DS sucks, instead get a DSi that comes with a transformation tool to a 3DS.
The Nintendo 3DS will be able to play Nintendo DS and DSi games but games published for the Nintendo 3DS will not be compatible with those systems.