Play as the Boss
 
 At the main menu, hold L1 + R2 + Circle + Start for five seconds.
 Then, select single player mode and choose any character.
 
 Bonus music
 
 Play tracks 2 through 34 of the game disc in an audio CD player.
 
  Game Shark Codez:
 
                   
  Enable Code (Must Be On) 
  80083F2C 00C8
                   
  Infinite Time            
  8008F7D3 0063
                   
  Player 1 Codes           
                   
  Infinite Energy          
  8008F9EC 0200
                   
  75% Energy               
  D008F9EC 0200
  8008F9EC 0180
                   
  50% Energy               
  D008F9EC 0200
  8008F9EC 0100
                   
  25% Energy               
  D008F9EC 0200
  8008F9EC 0080
                   
  No Energy                
  8008F9EC 0000
                   
  1-Hit Death              
  D008F9EC 0200
  8008F9EC 0001
                   
  Player 2 Codes           
                   
  Infinite Energy          
  8008F9F0 0200
                   
  75% Energy               
  D008F9F0 0200
  8008F9F0 0180
                   
  50% Energy               
  D008F9F0 0200
  8008F9F0 0100
                   
  25% Energy               
  D008F9F0 0200
  8008F9F0 0080
                   
  No Energy                
  8008F9F0 0000
                   
  1-Hit Death              
  D008F9F0 0200
  8008F9F0 0001