On the title screen, press 'Up, Down, Left, Right' on the d-pad. You will hear a chime. While holding the button that is the Genesis A button, press start. Go into the options menu. From there, play ...

At the title screen, enter the following code: Up, C, down, C, left, C, right, C, then hold A+C and press the start button. When the game starts, their should be lots of numbers which mess up the ...