Go to the Title screen and enter said codes to unlock these features. Press Start after pressing the button sequences below.

Effect	Code
Adjust Window Height	Down, Left, C, C.
Display Debug Data	Right, Right, X, B, A, L, L, L, R (on Controller Two).
Double Hit Points	X, Y, Z, Up, Down.
Hard Mode	Down, C, C, A.
Increased Difficulty	Down, Down, C, C, A.
Invincibility	Left, Right, B, C, C.
No Radar	B, B, B, Down, C.
No Targeting Squares	Left, Right, C, A.
Stage Select	Y, Y, A, Y, Y.
Tackle Attack	Right, Right, B, C, A.
Turret Lock	B, B, B, Up, C.
Unlimited 120mm Cannon Ammo	B, C, C, C.
Unlimited Ammo	B, B, B, C.
Unlimited Jump Rockets	Up, Right, Down, Left, Z.
Unlimited Jumps	Up, Right, Down, Left, Z.
View Ending Sequence	Down, Up, Right, A, Left.