Codes for Chopper Attack
Different Views in Chopper Select Screen
Go to a chopper but don't pick it yet. Hit the L button. There should be a screen with statistics and a rotating picture of your chopper. You can now use the analog stick to control the chopper's rotation.
At the "Press Start" screen, press C-Up seven times for level select.
While playing, press Z + C-Up + C-Down, then launch a homing cluster at your opponent. If it hits, you will see the president jump out of the plane.
To obtain an alien disruptor, beat level 7 on Expert.