For all of the codes below you will need
to go to the Start Game/Options Menu and then
Magic Codes and then Enter Code. After you type in
the word it tells you below press start and then you have
to go to the Code List and activate the code.

"arnold"- gives you big charecters and vehicles
"blabbermouth"- lets you hear your charecters voice instead of the horn
"doublevision"- lets two players pick the same charecter
"jointventure"- lets you have two players in adventure mode
"jukebox"- lets you alter the game music
"teenyweenies"- gives you smaller charecters and vehicles
The following codes only work in Multiplayer or Tracks Mode.
"whodidthis"- shows you the credits
"bodyarmor"- makes all baloons yellow and purple
"bogusbananas"- makes the bananas slow you down
"bombsaway"- makes all the baloons red
"byebyebaloons"- makes it so their are no baloons
"freeforall"- gives you a full power up from one baloon
"freebananas"- starts you off with ten bananas
"noyellowstuff"- makes it so their are no bananas
"offroad"- makes it so you don't slow down on grass
"oppositesattract"- makes all baloons are rainbow colored
"rocketfuel"- makes all baloons blue
"time to lose"- gives computer players umbeatable al
"toxicoffender"- makes all baloons green
"vitaminb"- lets you carry unlimited bananas
"zapthezippers"- makes so their are no zippers