Level select
 
 Select "Story" or "Team" mode, then hold C-Left + C-Right + C-Up +
 C-Down + R and press Right, Up, Left, Down when the level number is
 displayed. 
 
 Extra difficulty level
 
 At the Kemco logo, hold L + R + C-Up and press C-Right, C-Left, B.
 Then, a "Super Hard" difficulty setting will be available.
 
  Game Shark Codez:
 
                 
  Infinite Armor              
  8011D467 0064
                 
  Infinite Bombs              
  8011D46F 0003
                 
  Have Level 11 Vulcan Cannon 
  801239B3 000A