Yes. On both screens. The lcd's(lights) behind the screens are powerful and can be adjusted for brightness.
The Nintendo DSi has a built-in web browser.
Neither the DSi nor the DSi XL have a tracking device or GPS built in.
The Nintendo DSi does indeed have a built in alarm clock. It is accessible from the System Settings Icon
The DSi store comes already installed on the console.
No only the dsi has it.
Yes, Dsi has built in wifi. You need to configure it to your existing modem.
It has one built in. you can go to Nintendo dsi sound at the dsi menu and record sounds up to 10 secs
There are no cartridge games made for DSi, but you can buy games from the built-in DSi Shop, or use the internet browser from the DSi Shop to access made-for-DSi websites like DSiCade.com.
That's just the 'on' light to show the DSi is switched on, even when the lid is closed.
the dsi comes with a built in camera that you can use to edit pictures you can get internet for it and many othere stuff the dsi is around 170 dollars or so
The light blue DSi was one of two colors available at launch on May 3rd, 2008.
Skype is not available on the Nintendo DSi. The only game console that currently has Skype built in is the PSP.