All of them.
The DSi and 3DS can link and work together if they are both playing DS/DSi games. They will NOT link when the 3DS tries to link while playing a 3DS game.
no you can't play dsi games in ds but you can play ds games in dsi.
Yes Nintendo ds games work on DS, DS Lite and DSI. The DSI does not support gameboy advance games but the DS does.
Yes and no. There are NDS games as well as NDSi games but both can be played on the Nintendo DSi and Nintendo DS
A DSi uses DS games.
Yes, the DSi can play DS games
Yes, DS games do work in a DSi XL. The DSi XL is part of the DS line, so DS games are meant to work with it.
a real game yes a fake one no
No, the DS and DSi games will not be in 3D.
No, you do not. The DSi is simply an advanced version of the DS lite. You can play your DS games and only your DS games on the DSi, minus the fact that you can download games from the DSi store.
yes you can use Nintendo ds games in a dsi
ds games are dsi games