D/L cheat files from: http://www.ds-scene.net/ Use their Rom Tool to D/L CycloDS, EDGE or USRcheat.dat files.
these work as is on pokestation patched files.
ProjectPKMN patched files require the Game ID for Black 2 (J) to be changed from IREJ 5A023804 to IREJ 1AABC111 (use R4cce).
I copy usercheat.dat to cheat.dat and patch it for ProjectPKMN patched files.
you can switch between usercheat and cheat in DeSmuME Config - Path.
a few codes work on White 2 pokestation patched files and none at all for White 2 ProjectPKMN patched files in my limited experience.