Aero The Acro-Bat 2 is a side scrolling platformer for the Genesis. It was published by Sunsoft.
Aero The Acro-Bat 2 is a commonly available game for the Genesis. It shouldn't be too difficult to find this game for purchase. In good condition, the game is worth about $3.00.
At the menu screen, press Left, Left, A, B, C, Left, Up, Down, A, Right, A.
In the sound test mode, play 8, 4, 19, and 71. The screen will flash when you've entered the right order. Begin the game, then hold Down, A, C simultaneously to get the level select screen.