A:AnswerThis is an official Nintendo case, similar to the black one that launched alongside the original Switch. They’ve also done special editions for certain bundles such as Splatoon 2, Mario Odyssey and Diablo III.
A:AnswerI think you’ll be ok as long as it’s thin, it does expand some (I have a clear case on mine) and closes no problem. However for thicker cases it might be a bit too tight.
A:AnswerIt has space for 8 games in a soft divider between a mesh area for cables in the upper shell and the device itself on the lower shell. When closed the games fold up against the mesh area and load opposite that of most other cases - from the bottom, when that flap is folded down toward you.