Yes.
All DS games work on all DS systems.
Yes, the Nintendo 3DS (as well as the 3DS XL and 2dS) has its own 3DS games that will not work for the Nintendo DS, Nintendo DS Lite, Nintendo DSi, and Nintendo DSi XL.
Yes, the Nintendo DSi XL can play all Nintendo DS games, except for Guitar Hero, which requires a slot-2 add-on device. The DSi and the XL do not have a slot-2.
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.
where will you get nintendo dsi xl
yes a dsi charger fits a dsi XL and a dsi XL fits the dsi
No, only GBA ones. You cannot play regular Gameboy or Gameboy Color games on a DS.
What are you talking about? Pokemon games are played in Nintendo DS' or Nintendo DSi and Nintendo DSi XL. The games avalible are Pokemon Heartgold, Pokemon Soulsilver, Pokemon Pearl, and Pokemon Dimond, these games are played on the Nintendo DSi, DS, and Nintendo DSi XL. You can also play games online, Play on the official site, Pokemon.com.
All of the games that work for any DS will work for DSI XL.
No. You need a different cartridge for the dsi/dsi xl, such as the acekard 2i.
It is compatible with all DS games apart from any that require Slot 2, which the DSi and the XL do not have. (There is no such thing as a DSi XL specific game.)
a DSi XL is larger in size than a regular DSi.
No, it will not work