I’ve seen a few Game Boy phone cases out in the wild – protective cases which (unofficially) make the back of your mobile look like Nintendo’s classic handheld.
But Nintendo itself has registered a US patent (dug up by Siliconera) for a plastic shell which encases your phone in a Game Boy-shaped case, complete with working buttons.
This is something more than a standard case, with buttons that cleverly react with your device’s touchscreen beneath to register commands.
Source: Eurogamer Nintendo has patented a working Game Boy shell for your smartphone