So apparently Nintendo is providing its own development engine for making videogames to Third Party developers in order to provide a healthy environment where they can work, the engine was made to ensure low development costs as well as short development times. The engine was announced during GDC in Osaka and apparently a tech demo was shown.
Rough Translation, nobody is reporting this yet
Here's a picture of the tech demo that was shown at GDC
Which Nintendo game is this little robot from? Shown by Nintendo at #GCC2018 in Osaka today pic.twitter.com/0tUcRSbl1d