NostalgiaSagaPro - Super Retro

NostalgiaSagaPro is a super fast and full-featured video game emulator to run advanced video games on the broadest range of Android devices, from very low-end phones to modern tablets. It emulates nearly all aspects of the real hardware correctly..
super retro pro video game emulator, just enjoy old school games.
The emulator can be controlled using external USB/Bluetooth controllers, keyboard, touchscreen or trackball.

This is by far the only emulator that supports link cable emulation with decent speed.