Excuse me for my ignorance, but what is the diff between pokegen and pokesav?

I have never used pokegen, I use pokesav.

PokeGen is a much simpler version of Pokesav that takes up less of your screen,lawl Pokesav takes up so much room and memory

Actually now I kind of use both. I use pokesav to build the .PKM file, then I use pokegen to generate the action replay codes.