Cheats for BackTrack for GBA

Press Select at the "Dark Side Of The Moon" menu. Then, press L, Right, B, L, R, Left to unlock the "Build Secret Base" option. Enter the "Build Secret Base" screen, then press A and enter one of the following passwords.

All weapons 
Enter WEAP as a password. 

Unlimited ammunition 
Enter AMMO as a password. 

Invincibility 
Enter GOD as a password. 

200 health 
Enter HEA as a password. 

All keys 
Enter KEY as a password. 

Disable enemy AI 
Enter FRE as a password. 

Full armor 
Enter ARM as a password. 

Enemy on map 
Enter MON as a password. 

Coordinates 
Enter COOR as the password.