My OldBoy! supports Link Cable emulation to itself and to other devices, which is great for trading Pokemon or playing multiplayer games like Mario Golf.

My OldBoy! supports video filters through the use of GLSL shaders.

My OldBoy! supports bluetooth controllers through HID Android support.

My OldBoy! supports cheat codes for Game Genie and Game Shark which allow the user to change aspects of the game such as adding infinite lives.

For the few Gameboy games that have rumble or tilt support My OldBoy! will emulate those features through the devices hardware.