Unlimited Enchanced Vision:
Enter Left, Right, Up, Down at the Extras/Cheats menu.

Unlimited Gas Mines:
Enter Right, Left, Left, Up, Down, Right at the Extras/Cheats menu.

Unlimited Ground Pound:
Enter Right, Up, Right, Up, Left, Down at the Extras/Cheats menu.

Unlimited Invulnerability:
Enter Down, Down, Up, Left at the Extras/Cheats menu.

Unlimited Laser Eyes:
Enter Left, Left, Up, Right at the Extras/Cheats menu.

Unlimited Stealth Camo:
Enter Left, Down, Down, Down at the Extras/Cheats menu.

Unlimited SuperBark:
Enter Right, Left, Left, Up, Down, Up at the Extras/Cheats menu.

Level select:
Enter Right, Up, Left, Right, Up, Right at the Extras/Cheats menu.

All Mini Games:
Enter Right, Up, Right, Right at the Extras/Cheats menu.