Level select: Press Up, Down, Right, Left,
Start after the helicopter lands at the title screen. The
phrase "Stage Select" will appear to confirm correct
code entry.
Full weapon power: Pause game play and press Up, Down, Right,
Left, A + Start. This will also bring any
weapons collected to full power. Note: This code must be re-enabled
with each new life.
Eight bombs: Pause game play and press Up, Down, Right,
Left, B + Start. Note: This code must be
re-enabled with each new life.
View ending sequence: Press Start to display the green opening screen
and press Up, Down, Right, Left, A,
B, C, Start.
