Wikia

	Nintendo DS
<img alt="Nintendo DS Logo" src="data:image/gif;base64,R0lGODlhAQABAIABAAAAAP///yH5BAEAAAEALAAAAAABAAEAQAICTAEAOw%3D%3D" width="250" height="35" data-image-name="Nintendo DS Logo.png" data-image-key="Nintendo_DS_Logo.png" data-src="http://images1.wikia.nocookie.net/__cb20091109224646/fantendo/images/thumb/0/0b/Nintendo_DS_Logo.png/250px-Nintendo_DS_Logo.png" class="lzy lzyPlcHld" onload="if(typeof ImgLzy=="object"){ImgLzy.load(this)}" /><noscript><img alt="Nintendo DS Logo" src="http://images1.wikia.nocookie.net/__cb20091109224646/fantendo/images/thumb/0/0b/Nintendo_DS_Logo.png/250px-Nintendo_DS_Logo.png" width="250" height="35" data-image-name="Nintendo DS Logo.png" data-image-key="Nintendo_DS_Logo.png" /> <img alt="NintendoDeeEss" src="data:image/gif;base64,R0lGODlhAQABAIABAAAAAP///yH5BAEAAAEALAAAAAABAAEAQAICTAEAOw%3D%3D" width="250" height="227" data-image-name="NintendoDeeEss.png" data-image-key="NintendoDeeEss.png" data-src="http://images2.wikia.nocookie.net/__cb20120722170548/fantendo/images/thumb/3/3e/NintendoDeeEss.png/250px-NintendoDeeEss.png" class="lzy lzyPlcHld" onload="if(typeof ImgLzy=="object"){ImgLzy.load(this)}" /><noscript><img alt="NintendoDeeEss" src="http://images2.wikia.nocookie.net/__cb20120722170548/fantendo/images/thumb/3/3e/NintendoDeeEss.png/250px-NintendoDeeEss.png" width="250" height="227" data-image-name="NintendoDeeEss.png" data-image-key="NintendoDeeEss.png" />	An Electric Blue original DS
	An Electric Blue original DS
Developer(s)	Nintendo
Console Type	Handheld
	Feature(s)
	Dual-Screen
Subtype(s)	DS Lite DSi
Backward Compatibility	Game Boy Advance

The DS exists, and it can be found in real encyclopedias. You may read more about it here:

Wikipedia

The Nintendo DS is a Nintendo game system. It has two screens, with the bottom screen being the touch screen. It has improved versions called the Nintendo DS Lite, Nintendo DSi, Nintendo DSe and Nintendo DSA. It's successor is the Nintendo 3DS.

Nintendo DSiEdit

The Nintendo DSi is the 3rd edition to the Nintendo DS. The DSi has many capabilities that previous versions of the Nintendo DS do not, such as being able to browse the internet, downloadable games, two cameras, Facebook compatible and it is slimmer than the DS Lite and has a SD card slot rather than a Gameboy slot. It's sucessor was the DSi XL. And then the 3DS was released.