Bet you didn't see this one coming. Someone actually made a Gameboy emulator for the Virtual Boy. To spell it out for you, it's an emulator of Nintendo's most successful console to date, running on what was arguably their biggest flop ever. Mind=blown!
The project by German mystery coder M.K. is still in an early stage, but basically it does work. So, if you're (un)lucky enough to own a Virtual Boy, grab the download here. Updates will most likely be announced over at Planet Virtual Boy.
You can also give the emulator a try in mednafen. Yo dawg, I need an emulator to emulate your emulator ;)