Yes, they are different. The NDSi games are slightly enhanced and are built mainly with the DSi in mind. Therefore, since the DSi has a better processor, NDsi games generally have better frames per second when played on the Nintendo DSi.
Yes, the NDS can play NDSi enhanced games.
Yes, the NDSi can play games. These include NDS games as well as NDSi enhanced games and DSi ware games. They cannot play GBA games or 3DS games.
Yes and no. There are NDS games as well as NDSi games but both can be played on the Nintendo DSi and Nintendo DS
No, you cannot play 3DS games on a NDSi or NDS
yes the Pokemon black and white games are on all three NDS, NDS lite, and NDSi ( XL )
A 3DSc can play NDS and NDSi games
No, you can't. 3DS games are not playable for the NDS or NDSi.
Yes, the NDSi and NDS can connect to play DS games
I just bought a nds about 200 us dollars,it is the cheapest one i have bought.
Edit on your NDS, NDSL or NDSI.
The NDS and NDS Lite can only connect to the Internet with certain games that support connection with Nintendo WFC. You need to be near a hotspot or have your own wireless network at home. The NDS and NDS Lite only supports WEP encrypted wireless connections. The NDSi also supports WPA and WPA2. It also can make a wireless connection without the support of additional software/games.
Yes, all the power adapters are different so make sure you do not lose them.All meaning: NDSi NDS and NDSL. :)Hope this helps. :D