A Youtuber who goes by Ganjulationess3DS uploaded a video showing the first level of Pokemon Snap running on a 3DS.
The build was done by their self and despite missing some key features, it does run very well on dual screens. The user has noted that this is a private build and has no plans on releasing it to the public. They do however plan on sharing the camera control, picture taking, and path scripts running on the Unity engine.
You can view the video down below..