Special weapons (1943)
 
 Hold the following buttons before the corresponding level begins to
 start with a special weapon.
 
                   
  Level 
  Code                            
                   
  1     
  Down                            
                   
  2     
  Weapon 1                        
                   
  3     
  Up/Right + Weapon 1 + Weapon 2  
                   
  4     
  Down/Left + Weapon 2            
                   
  5     
  Weapon 1                        
                   
  6     
  Left                            
                   
  7     
  Up/Left                         
                   
  8     
  Left + Weapon 1 + Weapon 2      
                   
  9     
  Down/Right + Weapon 1 + Weapon 2
                   
  10    
  Up/RIght + Weapon 2             
                   
  11    
  Up/Left                         
                   
  12    
  Right + Weapon 1+ Weapon 2      
                   
  13    
  Up                              
                   
  14    
  Up/Left + Weapon 1 + Weapon 2   
                   
  15    
  Down/Left + Weapon 1            
                   
  16    
  Right + Weapon 1                
                   
 Sound remix mode
 
 Beat one of the indicated levels in the following games to unlock a
 "Sound Remix" selection on the options screen, which allows a remixed
 version of the background music to be played.
 
                               
  Game      
  Level
                               
  1942      
   16  
                               
  1943      
    8  
                               
  1943 Dash 
    5  
                               
  Game Shark Codez:
 
               
  1942                              
               
  Infinite Lives P1 & P2            
  8006AF00 0003
               
  Infinite Credits P1 & P2          
  8006AC74 0003
               
  1943                              
               
  Infinite Lives P1                 
  800D027E 0140
               
  Infinite Lives P2                 
  800D02FE 0140
               
  Infinite Credits                  
  8008D2E4 0002
               
  Infinite Time For Special Weapons 
  800D02CE 1F00
               
  1943 Dash                         
               
  Infinite Lives P1                 
  800D0C72 0140
               
  Infinite Lives P2                 
  800D0CF2 0140
               
  Infinite Credits                  
  8008F714 0002
               
  Infinite Time For Special Weapons 
  800D0CC2 1F00