Level select
 
 At the options screen, press L1, R1, L1, R1, L1, R1. Select the star
 field beyond what looks like the final level to play the original
 1972 Pong. 
 
 Unlock first level in all zones
 
 At the zone selection screen, pause the game and press L1, R1, L1,
 R1, then resume the game.
 
 Unlock second level in all zones
 
 At the zone selection screen, pause the game and press L2, R2, L2,
 R2, then resume the game.
 
 Unlock third level in all zones and more
 
 At the zone selection screen, pause the game and hold L1 + R1 + L2 +
 R2, then resume the game. This also unlocks the secret power-ups and
 the three classic black and white Pong versions.
 
  Game Shark Codez:
 
          
  Joker Command                              
  D00D851C ????
          
  P1 Score Modifier                          
  801F2B8C 00??
          
  P2 Score Modifier                          
  801F2CFC 00??
          
  Have All Gold Bars                         
  801F1C84 0063
          
  All Power-Ups P1 (GS 2.2 or Higher Needed) 
  50000E02 0001
  301F5020 0001
          
  Golden Atari Sign                          
  801F1E90 0015
  801F1E94 0015
  801F1E98 0015
          
  Unlock Zone 2                              
  801F1CD0 0100
          
  Unlock Zone 3                              
  801F1D10 0100
          
  Unlock Zone 4                              
  801F1D50 0100
          
  Unlock Zone 5                              
  801F1D90 0100
          
  Unlock Zone 6                              
  801F1DD0 0100
          
  Unlock Zone 7                              
  801F1E10 0100
          
  Unlock Zone 8/Old School Pong              
  801F1E50 0100
          
  Unlock All Penguin Pong Levels             
  801F1C94 0105
  801F1C96 0101
          
  Unlock All Soccer Stars Levels             
  801F1CA0 0105
  801F1CA2 0101
          
  Unlock All Log Jam Level                   
  801F1CAC 0105
  801F1CAE 0101
          
  Unlock All Clown Around Levels             
  801F1CB8 0105
  801F1CBA 0101
          
  Unlock All Beach Party Levels              
  801F1CD4 0105
  801F1CD6 0101
          
  Unlock All Rock N Roll Levels              
  801F1CE0 0105
  801F1CE2 0101
          
  Unlock All Seal Jungle Levels              
  801F1CEC 0101
  801F1CEE 0101
          
  Unlock All In A Spin Levels                
  801F1D14 0105
  801F1D16 0101
          
  Unlock All Puck Pong Levels                
  801F1D20 0105
  801F1D22 0101
          
  Unlock All Fishing Frenzy Levels           
  801F1D2C 0101
  801F1D2E 0101
          
  Unlock All Jungle Japes Levels             
  801F1D54 0105
  801F1D56 0101
          
  Unlock All Balloon Circus Levels           
  801F1D60 0101
  801F1D62 0101
          
  Unlock All Flock Fiasco Levels             
  801F1D6C 0101
  801F1D6E 0101
          
  Unlock All Dervish Danger Levels           
  801F1D94 0501
  801F1D96 0101
          
  Unlock All Pongball Wizard Levels          
  801F1DA0 0101
  801F1DA2 0101
          
  Unlock All Frog Follies Levels             
  801F1DAC 0101
  801F1DAE 0101
          
  Unlock All Henhouse Surprise Levels        
  801F1DD4 0501
  801F1DD6 0101
          
  Unlock All Polar Pivot Levels              
  801F1DE0 0101
  801F1DE2 0101
          
  Unlock All Zone 7 Levels                   
  801F1E14 0101
  801F1E16 0101
          
  Unlock Pong Size/Speed Secret              
  801F1EA2 0001
  801F1EA6 0001
  801F1EDE FFFF
          
  Have Ball Speed Secret                     
  801F1EAA 0001
  801F1EE0 FFFF
          
  Have Grab Secret                           
  801F1EAE 0001
  801F1EE4 FFFF
          
  Have Whack Secret                          
  801F1EB2 0001
  801F1EE8 FFFF
          
  Have Spin Grab Secret                      
  801F1EB6 0001
  801F1EEC FFFF
          
  Have After Touch Secret                    
  801F1EB8 0001
  801F1EF0 FFFF
          
  Have Smart Bomb Secret                     
  801F1EBC 0001
  801F1EF4 FFFF
          
  Have Magnetic Grab Secret                  
  801F1EC0 0001
  801F1EF8 FFFF
          
  Have Boomerang Secret                      
  801F1EC4 0001
  801F1EFC FFFF
          
  Have Stretch Secret                        
  801F1EC8 0001
  801F1F00 FFFF
          
  Have Spike Secret                          
  801F1ECC 0001
  801F1F04 FFFF
          
  Have Turbo Throw Secret                    
  801F1ED0 0001
  801F1F08 FFFF