Level select
 
 Enter "[Saturn][Spaceship][Rocket][Heart][Skull]" as a name. Then,
 press L + C-Right + C-Down to enter the special characters in the
 name. Any level in any game mode may now be accessed.
 
 Lines mini-game
 
 Enter "LINES" as a name. Now the object of the game is to remove an
 area large enough to released the trapped character. Line up three
 pieces in a horizontal or vertical line to remove them.
 
 Hidden music
 
 Enter "G[Alien head]MEBOY" as a name. Then, press L + C-Right +
 C-Down to enter the special character in the name. Enter the audio
 screen to access nine additional songs.
 
 View vortex sequence
 
 Enter "VORTEX" as a name. Then, hold the reset button. Now a sequence
 showing all robots being sucked into a vortex will be displayed after
 several seconds. Release the reset button to end the display.
 
 View credits
 
 Enter "CREDITS" as a name.
 
  Game Shark Codez:
 
       
  Single & VS Mode Codes                            
       
  Infinite Misses P1                                
  80112F9F 0003
       
  Secret Cheat Menu Screen                          
  8011265F 00AD
       
  Infinite Time P1                                  
  80112629 0000
       
  Weapon Modifier P1                                
  80110922 00??
       
  Single Player Mode Only                           
       
  Score Modifier P1 (Smaller)                       
  80112D18 ????
       
  Score Modifier P1 (Larger)                        
  80112D1A ????
       
  Infinite Slides P1 (Puzzle Mode)                  
  801127E9 0009
       
  Time Modifier (Larger-Puzzle Mode)                
  81112D2C ????
       
  Time Modifier (Smaller-Puzzle Mode)               
  81112D2E ????
       
  Infinite Misses P2                                
  80116207 0003
       
  Infinite Time P2                                  
  80115890 0000
       
  Weapon Modifier P2                                
  80113B8A 00??
       
  Gameboy Cheat Message                             
  80112F9E 0003
       
  Quantity Digits to Accompany Weapon Modifier Code 
       
  00 - Rocket                                       
  01 - Dynamite                                     
  02 - Magnet                                       
  03 - 3 Purple Bars                                
  04 - Drop Bomb                                    
  05 - Green Spike Ball