Invincibility
Press Y, A, X, B, Black, during game play.
100% success rate. 

Unlock All Planes
Press Y, X, B, Y, Black, during game play.
100% success rate. 

Super Primary Weapon
Press B, X, A, B, Black, during game play.
100% success rate. 

Five Thousand Dollars
Press A, Y, A, Y, Black, during game play.
100% success rate. 

Ten Tokens
Press X, B, X, B, Black, during game play.
100% success rate. 

Ultra Hard Difficulty
Press X, B, A, X, Black, during game play.
100% success rate. 

Extra Money
On the levels where you can fly around and choose what you want to do (such as Sea Haven), there are zeppelins that you can shoot. After hitting them with your secondary weapon for a little which, they will jettison money bags while you can pick up by flying through them. Hint: Apply your air brakes just before you get to the money bags to help make certain you successfully collect them.
Submitted by rparnell. 100% success rate. 

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