The phrase “Mario emulator” refers to any video game emulator software that is capable of running video games featuring Mario as a playable character. There are multiple console emulators that can run Mario games, including Jnes, Snes9x, Visual Boy Advance and Project 64.
As the word “emulation” itself denotes, emulator software imitates the processes involved in running a game. Emulators for old 8-bit and 16-bit consoles, such as Nintendo Entertainment System or Super Nintendo, do not require much processing power, which means that each system can run efficiently on a tablet or smartphone. On the other hand, some emulators with modern consoles require more powerful computers in order to operate efficiently.