Cheat Codes
Use a second PS2 controller to enter these. All must be done during gameplay.

All Hobo Fighting Moves - Hold L1, then press UP, LEFT, DOWN, RIGHT, TRIANGLE, SQUARE, X, CIRCLE.

Full Health - Hold L1, press R2, R2, R2.

All Gym Grapple Moves - Hold L1, press UP, LEFT, DOWN, DOWN, TRIANGLE, SQUARE, X, X.

Unlimited Ammo - Hold L1, press UP, DOWN, UP, DOWN.

All Clothes - Press L1, L1, R1, L1, L1, L1, R1, R1.

Full Ammo -- Hold L1, press UP, UP.

All Weapons -- Hold L1, press UP, UP, UP, UP

Money -- Hold L1, press TRIANGLE, SQUARE, CIRCLE, X.
 

Unlockable Decorations for Jimmy’s Room

As you progress through the game, you'll notice that Jimmy's room in Bullworth will fill up with various items as you complete missions. Complete the following to unlock these decorations:

Burned school banner - Complete the mission 'The Gym Is Burning' in Chapter V

Football Jersey - Complete Chapter IV Greaser JacketComplete Chapter III

Grim ReaperComplete the mission 'Funhouse Fun' in Chapter IV

Picture of Beatrice - Complete the mission 'That Bitch' in Chapter I

Picture of Lola - Complete the mission 'The Tenements' in Chapter III

Picture of Lola kissing Gordo - Complete the mission 'Jealous Johnny' in Chapter III

Picture of Mandy - Complete the mission 'Discretion Assured' in Chapter IV

Picture of Pinky - Complete the mission 'Carnival Date' in Chapter II

Picture of Zoe - Complete the mission 'Smash It Up' in Chapter V

Rat in a Jar - Complete the mission 'Rats In The Library' in Chapter V

Russel's shirt - Complete Chapter I

Teddy Bear - Complete the mission 'Carnival Date' in Chapter II

Various Chem Plant Signs - Complete both part of the mission 'Busting In' in Chapter V

Venus Flytrip Head - Complete the mission 'Weed Killer' in Chapter II