SNES emulator SiOS has the power to unlock Nintendo classics on iPhone 6, with only the slightest bit of layman-level fiddling required to get it running.
Installed and run via a Safari tab that pulls in the app from iemulators.com, the system offers compatibility with the usual range of SNES ROMs out there, which can be downloaded and saved for play at your leisure. Get the full instructions on how to do it over at iDeviceHype. Changing the phone's clock and clicking on some stuff is about all that's needed, technically speaking. [IDH via Cult of Mac]