The powercore+ 20100 has usbc. But why bother. There are plenty of USB to USBC cords that will work just fine with older powercores. I charge my Pixel C just as fast as the wall adapter with my non usb-c powercore 26800. I have faith it will do fine with a switch.
The only benefit I can see...
I just want to say again, as I see it was once said, this is incredibly overpriced and weak. Can't even fully charge a switch or close to it.
Anker has fast charge ones for a little more that are far larger in capacity. You could get away with charging one thing once with this mophie. Or you...