It’s a block-letter style rendering of the letter “N”. The two vertical parts are equal in size to one another and they are wider than the part of the letter that extends from the upper left to the lower right.
This is a Nintendo icon. We've made it in iOS style
, first introduced in iOS version 7 and supported in all later releases up until now (at least iOS 11). This style is based on thin two-pixel lines and is optimized for 50x50 px. Unlike other vector icon packs that have merely hundreds of icons, this icon pack contains 13,300 icons, all in the same style and quality.