from a cell phone screen protector would do the trick. If you love the look of the classic Game Boy, but want to play just about any classic game, grab a Raspberry Pi zero, and build a retro Pi Boy.

RGB signals are read directly from the GBA LCD socket by removing the handheld’s screen in favor of a ... to-analog output of Nintendo’s own Game Boy Player add-on for the GameCube.

The Game Boy remains the crown jewel not only of Nintendo's handhelds, but all on-the-go platforms that have ever released.