I'm not sure where to go to get an update for this...I have the same one from when I got my R4 back in june If this is against the new running of Romulation (no links/downloads) then please lock and ignore. thanks to anyone who can help.
Don't worry its not a Rom-Image of a copyrighted game so your fine. There is a large database of NDScheats for R4DS over at gbatemp (specifically this thread). All you do is replace the cheat.dat in your system folder (on R4) with the blank cheat.dat and new usercheat.dat in the rar. Suprisingly simple.