Cheat mode
Press [Start] at the title screen. Highlight the
"System Configuration" option, then hold [R] and
press [Start]. Press [L] + [R] on controller two
at the system configuration screen. The current stock, credits,
and stage will appear. Hold [A] + [B] + [X] + [Y]
(in that order) on controller two. The number of ships may now
be increased to thirty and credits may be increased to ninety-nine.
Any of the eight missions may also be selected for game play.
Cheat mode (alternate)
Highlight the "System Configuration" option
on the select screen. Hold [R] and press [B]. When the
system configuration screen appears, press [L] + [R]
on controller two. A sound will confirm correct code entry. A
special environment options screen will appear. Increase the number
of ships from three to five and credits from four to nine. Hold
[A] + [B] + [X] + [Y] (in that order) on controller
two. A sound will confirm correct code entry. A level select option
will appear. Press [Start] + [Select] on controller
two. A sound will confirm correct code entry. The number of ships
may now be increased to thirty and credits may be increased to
ninety-nine. Any of the eight missions may also be selected for
game play.
Bonus level
Reach the water stage on level two. Fly across the
water until reaching a yellow square marked with the letter "E".
Steer your ship behind the square and press [Up]. If your
ship was positioned correctly, it will warp to a bonus level.