I was referring to the "but they didn't re-make Crystal" comment you made, which ignores the fact that HGSS incorporated all of Crystal's bonus features into the main games. And the difference between Red/Green and Blue are minimal. Blue was basically released because the original game, Green, was extremely buggy. There's no real need to re-make Blue in FR/LG because it didn't really add anything to the games, except remove a bunch of glitches.