Well, if it's a GBA Pokemon game, he has to save by pushing L+R+B+Select and hitting Save and Yes.
That's called a Real Time Save.
If it's a NDS/NDSL game he should be able to save normally by in game means.
HOWEVER, if he cannnot save like that on a NDS game, you need to update your firmware.
Updated firmware can be found here:
I believe you'd want the "SCLite 1.7" that's under the Supercard Micro.
You put that on the memory card, start up the SCLite and run it as you would a game. Once it's all done you can remove it from the memory card and be all set.
That is, if you are indeed running the SCLite on a DS Lite.
Because if you're using an original DS with a SCLite, you may have issues.