I've heard a lot of stories about how tough it is to defeat Crash Man without the air shooter. However there is a simple way you can defeat him with the mega buster. When you take a shot at him he will jump and fire a crash bomb his jump can be used against him. When he is about 3 to 4 inches in front of you on the screen jump and fire a shot at the peak of your jump when you fire the shot Crash Man will jump right into your shot. As soon as you hit the ground run under him and don't stop when done correctly his crash bomb will miss you. If you can master this technique like I have you can come away with a flawless victory.