I'm building a Raspberry Pi handheld emulator. For real.
Building your own?
Game Boy Null Kit - http://snazzy.fm/null
Raspberry Pi Zero W - http://geni.us/IjLBA6
Battery - http://geni.us/9JXveh
A few years ago, I started building a PiGrrl (which was a handheld Game Boy like emulator for Raspberry Pi). My 3D printer didn't want to cooperate, electronics needed to perform the build were sparse, and it was early days of Pi emulation. Things are a lot better now, so after much request, I'm back to build the ultimate retro handheld emulator.