Streaming with nintendo (3)DS

Question

I Recently found a streamer on twitch that was streaming his Nintendo DS mario Kart over the internet. Now as a streamer myself I know how PC streaming works, but how exactly is it possible to stream from a nintendo ds? I couldn't find any Xsplit or similar in the nintendo app store.

Answer 1

According to this streamers FAQ, he uses a capture card and OBS (open broadcasting software).

A 3DS game capture card can be found here