It depends on what code you want and what game it is.
Just gotta go an normal menu the do the code up,left,down,right,up,left,down,right,up,left,right,down,right,R,L,start,select debug cheat.
The Konami Code (Up, Up, Down, Down, Left, Right, Left, Right, B, A) will get you some wallpapers.
In PS2 the cheat of Car Ride cheat is Up,Down,Left,up,r1,r2,l2,l1,left,right,left,right,r1.
Down, X, Right, Left, Right, R1, Right, Down, Up, Triangle . If this doesn't work, then it's impossible.
the cheat-code is:R1R1R2R2L1L1up,down,right,left,circle,triangel,x,x,x,x,R1and triangel (2x)
up up down down left right left right b a start.
Up, Up, Down, Down, Left, Right, Left, Right, A, B, Start. Contra
Up, down, right, left, start
The most common cheat code would be: Up, up, down, down, left, right, left, right, B, A, enter. OR Up, up, down, down, left, right, left, right, B, A, start. Note: These cheat codes, of course, do not work on every single video game/game, but are very common.
Just gotta go an normal menu the do the code up,left,down,right,up,left,down,right,up,left,right,down,right,R,L,start,select debug cheat.
up down start select square left right circle
The Konami Code (Up, Up, Down, Down, Left, Right, Left, Right, B, A) will get you some wallpapers.
infinite nos left up left down left down right x Infinite Crew Charge Cheat code: Down, Up, Up, Right, Left, Left, X Infinite Speed-Breaker Cheat code: Down, Right, Right, Left, Right, Up, Down, X Need For Speed Carbon Logo Vinyls Unlocked Cheat code: Right, Up, Down, Up, Down, Left, Right, X Need For Speed Carbon Special Logo Vinyls Unlocked Cheat code: Up, Up, Down, Down, Down, Down, Up, X
you have to use this cheat: Up,Left,Down,Right,Left,Left,Right,Right
there is no cheat code it is a mod there is no cheat code it is a mod
up up down down left right left right BA BA
left inverted, right inverted, up inverted, down, right, left,right,down inverted.