Yes, it's a regular DS game, any DS and DSi can play it.
Yes, you most certainly can!
You can't, you need to buy the game for Nintendo ds or ds lite.
No. None of the old Game Boy or Game Boy Color games work on any version of the DS.
You can't save in the lite version of the game
you may purchase a small pack to go under your game that allows certain cheats such as capture trainers Pokemon(dsi version) or walk through walls(ds lite version)
No. Pokemon black/white is only for ds and ds lite.
Yes you can generally play Pokemon black and white 2 on ds lite, but it can be really difficult to get certain functions to work on the ds lite, such as the ability to go into battle mode.
Yes, it will run on the original, the lite, the DSi and the XL.
The lite version is, full version is $4.99.
Nintendo DS Lite Handheld Console --- $197 Nintendo DSi --- $248 Nintendo 3DS --- $248 Pokemon Black or White --- $47 (big W) Pokemon Black or White --- $58 (Game) Pokemon Black or White --- $68 (EB Games)
Which version do you have? I have the lite, and the dsiXL but none of them have it.