In June of this year, Nintendo filed a patent for Game Boy, Game Boy Color, and Game Boy Advance emulation on mobile devices.
The patent isn’t entirely new; this filing is just a continuation of one originally made in 2003. The abstract describes the patented invention as “A software emulator for emulating a handheld video game platform such as GAME BOY.RTM., GAME BOY COLOR.RTM. and/or GAME BOY ADVANCE.RTM. on a low-capability target platform (e.g., a seat-back display for airline or train use, a personal digital assistant, a cell phone).”
Don’t count on seeing official Nintendo ports on your smartphone anytime soon, however. Nintendo has been sitting on this technology for a while, and has been generally against putting its games on platforms other than its own. As with many other corporate patents, the technology this one depicts may or may not ever see the light of day, and may have been filed with legal implications in mind.