Yes.
All games that work on Nintendo DS will work on Nintendo DS-i
Yes. Nintendo ds games are not region coded.
Nintendo DS and Nintendo DS Lite support Nintendo DS games and Game Boy Advance games. Nintendo DSi and XL only support Nintendo DS games.
Of course. All Nintendo DS games work on Nintendo DS Lites. some Nintendo DS/lite games do not work on the DSi, however (like guitar hero on tour) because the DSi has no GBA slot.
Yes, games from any region will work on a DS from anywhere.
Yes
No Nintendo DS games work on Nintendo DS game consoles and maybe some other Nintendo and not on any of the Xbox or PlayStation game consoles regardless of the country or region.
Yes, Nintendo DS games work on the XL.
Yes, regular DS games are not region locked.
Yes it can there aren't games that only work for dsi
Yes. All DS games work on all DS systems.
All Nintendo DS are region-free, there is no regional lockout. Any Nintendo DS game will work with any Nintendo DS, and any Nintendo DS game is compatible for multiplayer with another Nintendo DS game, of a different country of origin. I DON'T KNOW!!!!!!!