Cheats

Does anyone know where i can get the latest cheat files. Is the latest cheat files from 12-08-09 ?

http://cheats.gbatemp.net/Temp/

thanks do they contain cheats for all existing games?

Not all games. Just the games that they made/added codes for.Open the database with an editor like R4CCE to see which games are in the temporary cheat file.
http://hp.vector.co.jp/authors/VA013928/soft_en.html