Does anybody know midnight club LA remix codes for the PSP or cheats or glitches or ..... 4 other games?

I just got a PSP on Dec. 26 and I got some games and etc. I was going 2 options and found that it says cheat codes and now I want codes or glitches or watevr 4 PSP. The games I have r midnight club LA remix, NBA 09 the inside, and Ratchet and Clank size matters. Help please!