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.
Yes Nintendo ds games work on DS, DS Lite and DSI. The DSI does not support gameboy advance games but the DS does.
Yes,they do work on a dsi.
Yes, Ds games work with the Dsi as well, but not Game-Boy games
Yes. All DS games work on all DS systems.
Yes they do all of the ds games work on any Ds or dsi it doesnt matter about the country u are in
All DS games work on the NDSi.
All of the games that work for any DS will work for DSI XL.
Yes, DS games are not region locked so the DSi can play them
Yes, dsi games works on the 3DS also DS games work on the 3DS.
Yes, the Nintendo DS lite can play DSi games
All games that work on Nintendo DS will work on Nintendo DS-i