Super fast GeeBee
At the "Now Loading" screen, rapidly tap X until the GeeBee aircraft flies to the top of the screen. If you entered the code correctly, the word "Good!!" will appear. Now the GeeBee will now fly over 100 mph faster than normal during a game.

Bonus planes
At the title screen, hold R1 + L2 and quickly press Select(20) on controller two. If you entered the code correctly, you will hear a sound. Now the F-16 and F-117A will be available on the plane selection screen.

Change plane color
While the game loads, hold R2 + L1.