Second Level: Helicopter Battle
When fighting the helicopter, you have to dodge the rocket and gun fire, then you have to eventually dodge the rocket fire 3 times at the end you will be prompted to press Z. The next level is The Jungle.
Various Codes
Enter the "Extras" menu, then select "Cheats". Enter one of the following codes to unlock the corresponding cheat option. To toggle a cheat on or off, pause game play and enter the "Cheats" menu.
Unlimited Enchanced Vision
Press Left, Right, Up, Down.
Unlimited Gas Mines
Press Right, Left(2), Up, Down, Right.
Unlimited Ground Pound
Press Right, Up, Right, Up, Left, Down.
Unlimited Invulnerability
Press Down(2), Up, Left.
Unlimited Laser Eyes
Press Left(2), Up, Right.
Unlimited Stealth Camo
Press Left, Down(3).
Unlimited SuperBark
Press Right, Left(2), Up, Down, Up.
Level select
Press Right, Up, Left, Right, Up, Right.
All Mini Games
Press Right, Up, Right(2).