Big Mutha Truckers cheats and cheat codes for Gamecube

Unlock all cheats and Evil Truck:
Go to the options screen and enter:
CHEATINGMUTHATRUCKER or ATJCEHJMJ as a code.

You can enter the following codes in the options screen also:
Faster truck: Enter GINGERBEER 
Extra stages: Enter JINGLEBELLS 
$10 million: Enter LOTSAMONEY 
Stage select: Enter LAZYPLAYER 
No time limit: Enter PUBLICTRANSPORT 
No damage: Enter 6WL 
Auto Sat Nav: Enter USETHEFORCE 
Diplomatic immunity: Enter VICTORS 
Small pedestrians: Enter DAISHI
Evil truck: Enter VARLEY

Unlock Evil Truck 
Finish the 60 day Trial By Trucking and win 1st place in the race 

Get speed: 
Do not buy anything in the upgrade store except for storage space and 
the turbocharger. Do not buy brakes at any cost. 

Unlimited money
Press Circle, Circle Square, Circle, Circle, Select at the main menu. 
If the code is accepted, you will hear a sound. Begin a new game, 
then press Select when it starts.