Geez... I feel stupid. Of course it is copyrighted. Duh me...
But yeah, I was wondering more about why they were needed. I mean they could of make thier "own" regions like Kanto and Honenn, but then it would of been different and not the real thing, sorta. But it makes sense what @fredrichnietze said -- "red and emerald provide the maps and pokemon in game. hg/ss provide updated graphics and follower sprites." That was what I was looking for.
I guess they are trying to make it as real as possible!! And I can't wait for Johto region.
So my next question is- Do I need the SS/HG rom, to get the Johto pokemon, or can I get those through the emerald/firered roms?