John NESS is NESS multi emulator for android 6.0+. This app does not work without your own game files.
Features - Original engine - High quality rendering - Search game files in SDCard & Internal Storage - Virtual On-screen keypad - Zipped file support - Save States (with previews) - Fully customizable layout - Customizable keys - Turbo buttons - Screenshot - Fast forward / Slow down (x0.25 - x16) - Bluetooth/MOGA controller support - Dropbox support (requires John DataSync)