I thought it would be a good idea to make a system UI kit for Sketch, so other designers can jump into app explorations for the platform. And who knows, maybe Nintendo will allow third-party developers to make apps in the future.
It contains various system screens in light and dark modes as well as many elements and icons as symbols.
Nintendo uses a modified version of the font UD Shin Go NT with Regular and Bold weights, which is exclusive to the Switch. This UI kit substitutes Nintendo's custom version with the font A-OTF UD Shin Go Pr6N.
You can download A-OTF UD Shin Go Pr6N from Adobe Typekit if you're subscribed to Adobe Creative Cloud.