Here are some cheats and tips for the game Phalanx.
Cheat mode:
Highlight the “System Configuration” option on the
select screen. Hold R and press B. When the system
config 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.