Unlockable - Homer's Secret Ride | |
| Complete all 10 missions on mission mode. Then select Homer to use his new car. | |
Unlockable - Use Burns' Car | |
| To drive as Smithers in Burns' Car go to the options screen and Hold in the L and R buttons and enter in the following code: B, B, Y, Y You should hear a sound if done correctly. | |
Easter Egg - Unlock Frankenbart | |
| To unlock a Halloween Bart Simpson, set your GameCube's date to 10/31. Bart will appear as Frankenstein on the character select screen (under the ? category). | |
Easter Egg - Unlock Marge the Pilgrim | |
| To see Marge all dressed up like a Pilgrim, set your GameCube's date to Thanksgiving day (November 22). Marge will be selectable at the character select screen. | |
Easter Egg - Unlock New Year's Krusty the Clown | |
| To unlock a special holiday suit for Krusty, set your GameCube's clock to January 1. Krusty, in his spiffy duds, will be selectable from the Character Selection screen. | |
Easter Egg - Unlock Santa Apu | |
| To see Apu dressed as Santa Claus, set your GameCube's date to December 25. The jolly Kwik-E Mart owner will then be available on the character select screen. | |
Secret - Skip Missions | |
| Missions 1 through 9 can be skipped if you fail them 5 times. The last mission, however, cannot be skipped. Also note that skipping the missions does not prevent you from getting your reward, The Homer. | |
Password - Use Nuclear Bus | |
| To drive as the Nuclear Bus go to the options screen and Hold in the L and R buttons and enter in the following code: B, B, Y, A You should hear a sound if done correctly. | |
Password - Use "Box" Car | |
| To drive as a small red box with no driver go to the options screen and Hold in the L and R buttons and enter in the following code: B, B, Y, X You should hear a sound if done correctly. | |
Password - Use Thanksgiving Marge | |
| To drive as Thanksgiving Marge (no matter what the date) go to the options screen and Hold in the L and R buttons and enter in the following code: B, B, X, X You should hear a sound if done correctly. | |
Password - Use New Years Krusty | |
| To drive as New Years Krusty (no matter what the date) go to the options screen and Hold in the L and R buttons and enter in the following code: B, B, X, Y You should hear a sound if done correctly. | |
Password - Use Halloween Bart | |
| To drive as Halloween Bart (no matter what the date) go to the options screen and Hold in the L and R buttons and enter in the following code: B, B, X, A You should hear a sound if done correctly. | |
Password - Use Christmas Apu | |
| To drive as Christmas Apu (no matter what the date) go to the options screen and Hold in the L and R buttons and enter in the following code: B, B, X, B You should hear a sound if done correctly. | |
Password - All Characters Are 2 Dimensional | |
| To turn all of the characters into 2D, similar to cardboard cutouts go to the options screen and Hold in the L and R buttons and enter in the following code: X, X, X, X You should hear a sound if done correctly. | |
Password - Nighttime Mode! | |
| To drive through the streets of Springfield at night go to the options screen and Hold in the L and R buttons and enter in the following code: A, A, A, A You should hear a sound if done correctly. | |
Password - Extra Camera Angles | |
| To get additional camera angles, such as Top View and Look Mode go to the options screen and Hold in the L and R buttons and enter in the following code: B, B, B, B You should hear a sound if done correctly. | |
Password - Debug Mode | |
| To enter a sort of debug mode, where all objects are surrounded by lines go to the options screen and Hold in the L and R buttons and enter in the following code: B, B, A, A You should hear a sound if done correctly. | |
Password - Slo-Mo Mode | |
| To turn all of the characters into 2D, similar to cardboard cutouts go to the options screen and Hold in the L and R buttons and enter in the following code: A, X, B, Y You should hear a sound if done correctly. | |
Password - Turn off the map | |
| Go to the options screen and hold in the L & R buttons while entering Y, B, B, X. You will hear the confirmation sound, and this will turn off the small map on the lower left corner of the screen. | |
Password - Clear All Codes | |
| To clear all the codes you have entered, click L and R at the options screen and enter: Start, Start, Start, Start You will hear a raven sound if the code is put in correctly. | |
Password - Extra Paper Money (PAL only) | |
| Hold down the L and R button on the options screen and then enter the following codes to unlock more Springfield Dollars: Y, Y, Y, Y | |
Password - Vertical Split Screen | |
| Highlight ''Options'' and hold L and R, then press: Y,Y,Y,Y | |
Password - Get Blimp View | |
| Enter Options screen and hold L and R and press X X X Y. You should here a sound if correct | |
