The Nintendo 3DS was the first Nintendo handheld to include built-in stereoscopic 3D without special glasses.
Nintendo released the 3DS in 2011. Its upper screen used an autostereoscopic display, allowing compatible games and applications to create a depth effect without requiring the player to wear glasses. A slider let users adjust the intensity of the effect.
The system also included two cameras that could capture stereoscopic photographs, along with motion sensing and backward compatibility with Nintendo DS software. Nintendo later released the 2DS, which played 3DS games but presented them in a flat, non-stereoscopic format.
The Virtual Boy also created stereoscopic visuals, but it was a separate console released in 1995 and used a red monochrome display. It was not a handheld in the same design category as the 3DS.