I have a similar question:
I succeded in writing down some gameshark codes in cwcheat database, for super mario world (Snes9xTYL) and Final Fantasy VI Advance (Gpsp). I can see them, activate them, but they don't work.
I think I'm using the right format: _S, _G, _C0, _L, and the XXXX-XXXX format, but nothing. But now I'm reading about converting them, and I'm not so good with this kind of stuff
Could someone explain to me? Thanks a lot