Introduced 3d graphics to handheld gaming, aswell as a touch-screen

Has all features of the og ds, but with an improved design

Introduced Wi-fi, a camera, and access to the web, all in exchange for the gba game card slot.

added autosterioscopic 3d visuals & improved hardware, allowing for a wide range of higher-quality games.

The last version of the 3ds before the New3ds and New2ds, without the folding shell

Links!!

Modding resources:

If you want to mod your ds, you'll need an sd card reader, an sd card, a computer, and usually an sd card formatter on your computer!!! :p

Dsiguide has 2 free formatters that I know of

The World Ends With You

Pokemon Black and White

Animal Crossing: Wild World

Trauma Center: Under the Knife

Rythm Heaven