To activate a cheat: pause the game, hold R1 while entering its corresponding code, then push Select.

• 100 GEX lives -- Up, Circle, Triangle, Down, Right, Square, Down
• Bolts of electricity -- Right, Left, Right, Circle, Triangle, Right, Circle, Down, Right
• Fire balls -- X, Up, Right, Up, Right (2)
• Ice balls -- Circle (2), Left, Down, Circle, Up, Right
• Invulnerability -- X, Square, Down (2), Up, Down, Right
• Super jump -- X, Circle, Up (2), Down, Right (2)
• Super speed -- Down, Start, Right (2), Down, Up, Start
• Unlimited lives -- Up, Circle, Triangle, Down, Right, Square, Down

To select a level, press [R1] + Select at the Media Dimension. Then enter the following code: Circle, Start, Right, Up, Square, Left (2), Up, Start.

To select a stage within a level, press [R1] + Select during a game. Then enter the following code: X, Square, X, Right, Right, Up, Left, Circle (2), Down (2).

• Cemetery
  1-1 Frankie and Heli --
  1-2 Grave Digger -- SVZFKHGP
  1-3 Tomato Soup -- BXRFYHGP
  1-4 Disco Inferno -- ZVTCYHGP
  1-5 Spin-n-Puke *
  
• New Toonland
  2-1 Pow! -- KXVKRHKP
  2-2 Twin Towers -- CVHCSHKP
  2-3 Rock it! -- SVKLPHKP
  2-4 Knock! Knock! -- CVBLPHKP
  2-5 The Flatulator *
  
• Jungle Isle
  3-1 Feeding Frenzy -- RVTCSHGP
  3-2 Congo Chaos -- XVVBRHKP
  3-3 Jungle Gym *
  
• Kung Fuville
  4-1 Sumo City -- YTCHPHKP
  4-2 Fish Bait -- ZTDHPHKP
  4-3 Chop Chop -- DXVGRHKP
  4-4 Toxic Turtle *
  
• Rexopolis
  5-1 Rez Knight Fever -- GYVYRHKP
  5-2 On the Move -- PZYPRXYL
  5-3 Rez's Lair *
  
• Planet X
  6-1 Saucer Section -- RYYRYXKB
  6-2 Free Fall --
  6-3 Bombs Away --
  6-4 Newton's Fourth Law --
  6-5 Head to Head --
  6-6 The Project (Phat City) --
  6-7 The Web --
  6-8 Clothesline --
  

* Boss levels have no codes.