I think there are some where. I recall it being mentioned.
If you're refering to my post-
original gameboy, as in- circa 1990. I mean there are homebrew games for it, but you need either a emulator or a flashable cart- it was kind of a joke, but it would actually (now that I think about it) probably even be possible to make a web browser for it- if the WIFI connection was part of the cart. Kind of a limited market, however.