Enter the PASSWORD screen and enter this code: Red Cheese, Yellow Mouse, Green Cat, Blue Dog. To finish, enter any combitnation of the following in RED:

Dog - Always have X-ray specs
Teacup - All cheese mines and Stiltanium machines destroyed!
Star - Start with 5 fish/frogs of energy
Fish - Invincible!
Skull - Start with 1 fish/frog of energy and 1 life
Book - Open map! Go anywhere!
Cupcake - Always start with homing cupcakes on fruit gun pick up!

After you have selected what you want, EXIT the password screen and start a new game.