Open Season (GBA)

Open Season cheats:

Change Boog into a Polar Bear
At any time in a level, bring up the pause screen and hold down L. While holding L press Down, Up, Down, B, A. When you resume the game, Boog will now be snow-white giving the appearence of a Polar Bear.

Extra lives and skip levels
At any time during the game, press start to pause and then hold down the L button. The words "Cheat Mode" will appear on the screen. Continue to hold L down and enter any of these passwords for the desired affect. Note that you can only use three cheat codes per save file and that you must be on a level in order to skip it. The words "Cheat Mode" flash green if entered correctly.

Code - Effect

Up, Right, Down, Left, Up, Select, Start - 30 Woo-Hoo bars
Start, Select, B, A, Right - Skip "Bever Land"
Start, Select, B, A, Left - Skip "Duck Land"
Start, Select, B, A, Up - Skip "Rabbit Land"
Start, Select, B, A, Down - Skip "Skunk Land"
Start, Select, B, A, B - Skip "Squirrel Land"
Up, Up, Down, Down, Left, Right, Left, Right, B, A, Start - Three extra lives


Other Sites you may consider
CheatServer.Com
Cheat Codes Club