Though the VMU as a portable device wasn't widely supported by developers (its puny processing power limited it to minigames like taking care of a Chao in Sonic Adventures or showing health stats in Resident Evil: Code Veronica), modders have given the tiny gadget new life as a retro console emulator.
It's actually not as complicated as it looks to mod a VMU into a classic games emulator. YouTube user wermy shared an in-depth tutorial (and project log) on how to make one yourself.
You can find a very detailed step-by-step guide here. But all you're really doing is disassembling the VMU, unwiring cables, hollowing out the inner plastic shell and jamming a Raspberry Pi W, new color LCD screen, and a lithium-ion battery inside. Soldering experience is a must!
The screen varies on exact size, type, and resolution. Generally, you want a screen about 1.45-inches in size. These can range anywhere from about $5 for an LCD with 128 x 128 resolution to an OLED with 160 x 128 resolution is another $18.
This little emulator makes for a great weekend project. Now, you just need to go and make it. Bad at DIY? Consider buying one from MarkyPi Gaming. Enjoy your VMU. It’s thinking.