Taki Udon recently showed off an FPGA-based Game Boy Color… albeit with the markings on the chip unmistakably filed off.
There was also the GB Boy Colour [sic] which had some kind of clone SOC. And initially ran a full 30% faster than it was supposed to. No idea how they fumbled that so blatantly.
With the accuracy of modern emulators, we really should be able to fake a whole GB/C or GBA, from new. The GBA even technically uses a standard ARM core. There were emulators and homebrew out before the machine even launched.
Taki Udon recently showed off an FPGA-based Game Boy Color… albeit with the markings on the chip unmistakably filed off.
There was also the GB Boy Colour [sic] which had some kind of clone SOC. And initially ran a full 30% faster than it was supposed to. No idea how they fumbled that so blatantly.
With the accuracy of modern emulators, we really should be able to fake a whole GB/C or GBA, from new. The GBA even technically uses a standard ARM core. There were emulators and homebrew out before the machine even launched.