Cheat Mode
     Enter the gallery and quickly press Up, X, Y, X, Down, Y, X, Y, Y
on  the  first  screen.  All  planes,  gallery  entries, and two bonus
options will be unlocked.

Unlock Bonus Levels
     Successfully  complete  the  game  in  arcade mode to unlock more
levels in score attack mode.

Unlock Bonus Planes
     To  unlock  all  five  of  the  original  planes  from Giga Wing,
successfully  complete the game under any difficulty setting with each
character without continuing. The character you complete the game with
will  determine  the  plane that is unlocked. Complete it with Kart to
unlock  the  Raijin,  Romi to unlock the Purchka, Ralugo to unlock the
Widerstand,  Limi  to  unlock  the  Stranger,  and Chery to unlock the
Carmine.