To get more money ($500) type AMUNKEY as a passcode.
To play Daffy in his Danger Duck outfit use the passcode DANGER.
To play a Duck Danger Battle type OUTTAKE as passcode.
Type in SUITSYOU in the password section to get Free Costume Doors.
Put SLAPPY as a code to get slappy fish.
If you want your toon character to get another attack use the code HENSAWAY and you will get this new option.
For a passcode put TOUGHAGE. This will make it so Bugs and Daffy cannot lose their lives.
To show the gossamer doors use the passcode GOBBLE.
To unlock a mini-game with Wile. E. Coyote type FURRYOUS as a passcode.
To play in the cannonball costume for the whole game type CANNON as a passcode.
Put PASSPORT as a passcode. This will allow you to select a level.
To get the ACME Shrink Ray use WEENY as a passcode.