This is a GameBoy emulator DogP has been porting to VB. Yesterday, I did some hacking on the LCD emulation and got it displaying the background. I also have keypad emulation.
Go here: http://www.dragoneyestudios.net/hosted/parasyte/vbgb/ for screenshots.
And before anyone asks, it’s VERY slow, (~1 frame per 10 seconds) and it’s nowhere near complete.