My OldBoy! - GBC Emulator 1.1.0 (paid version)

My OldBoy! is a full-featured and super-fast emulator to run Game Boy and Game Boy Color games on the broadest range of Android devices, from very low-end phones to modern tablets. It emulates accurately almost every aspect of the real hardware. Special features including link cable, rumble, and tilt sensor are also supported. You can also make your GB games colorful by selecting a custom palette.
Of course it does not just emulate the hardware. Thanks to the save state system, you can save progress at any time and return back to it instantly. And while enabling fast-forward in game, you can quickly skip to the part of the game you are mostly interested in.