Level select
 
 Pause the game, then hold Z and press R, B, A, B, A, C-Up, C-Down,
 C-Left, C-Right, C-Up, C-Down, C-Left, C-Right. If you entered the
 code correctly, you will hear a sound. Then, highlight the new
 "Unlock Worlds" option that appears and press A to select any level.
 
 Bonus levels
 
 Pause the game, then hold Z and press C-Down, L, R, L, R, L, R, L, R,
 L, R. If you entered the code correctly, you will hear a sound. Then,
 highlight the new "Enter Secret Worlds" option that appears and press
 A to play the new levels. 
 
  Game Shark Codez:
 
                     
  Infinite Lives        
  8015299F 0063
                     
  All Navigation Pieces 
  8015298B 0005
                     
  High Gold             
  80152AFF 0032
  8015293B 0032