Drive red soapbox car
At the options menu, hold L + R and press B(2), Y, X. If you entered the code correctly, you will hear a sound.
Drive as Smithers in Mr. Burn's car
At the options menu, hold L + R and press B(2), Y(2). If you entered the code correctly, you will hear a sound.
Drive Nuclear Bus
At the options menu, hold L + R and press B(2), Y, A. If you entered the code correctly, you will hear a sound.
Hidden New Year's character
At the options menu, hold L + R and press B(2), X, Y. If you entered the code correctly, you will hear a sound. Alternately, set the system date to January 1 to unlock New Year's Krusty under the "?" at the character selection screen.
Hidden Halloween character
At the options menu, hold L + R and press B(2), X, A. If you entered the code correctly, you will hear a sound. Alternately, set the system date to October 31 to unlock Halloween Bart (dressed in a Frankenstein costume) under the "?" at the character selection screen.
Hidden Thanksgiving character
At the options menu, hold L + R and press B(2), X(2). If you entered the code correctly, you will hear a sound. Alternately, set the system date to the third Thursday in November to unlock Thanksgiving Marge (dressed in a Pilgrim costume) under the "?" at the character selection screen.
Hidden Christmas character
At the options menu, hold L + R and press B(2), X, B. If you entered the code correctly, you will hear a sound. Alternately, set the system date to December 25 to unlock Christmas Apu (dressed in a Santa costume) under the "?" at the character selection screen.
Extra money
At the options menu, hold L + R and press Y(4). If you entered the code correctly, you will hear a sound.
Turbo
At the options menu, hold L + R and press A, B(2), A. If you entered the code correctly, you will hear a sound. While driving, hold and release Y for a turbo boost.
Stop time
At the options menu, hold L + R and press X, B, Y, A. If you entered the code correctly, you will hear a sound. Press R to start, stop, and reset the timer.
Extra camera views
At the options menu, hold L + R and press B(4). If you entered the code correctly, you will hear a sound.
Overhead view
At the options menu, hold L + R and press X(3), Y. If you entered the code correctly, you will hear a sound.
Nighttime mode
At the options menu, hold L + R and press A(4). If you entered the code correctly, you will hear a sound.
Slow-motion mode
At the options menu, hold L + R and press A, X, B, Y. If you entered the code correctly, you will hear a sound.
Flat characters
At the options menu, hold L + R and press X(4). If you entered the code correctly, you will hear a sound. All the people (except the character you selected) will be flat.
Show collision lines
At the options menu, hold L + R and press B(2), A(2). If you entered the code correctly, you will hear a sound.
No map display
At the options menu, hold L + R and press Y, B(2), X. If you entered the code correctly, you will hear a sound.
Hidden car
Successfully complete all ten missions in mission mode to unlock The Homer car. The car is selectable in any mode by choosing Homer's picture at the car select screen.
Mission skip
Intentionally fail a mission five times to have the option to skip the mission. Note: This cannot be done on the final mission.
Extra time
To get +2 seconds, hit the phone booths that have Mr. Burns' picture on them. You can get +2 seconds in the road rage levels by running over the Transit bus stops.