It depends on how far you are into the game.
you cant go to mars on pokemon saphire you can only go to mars if you were a astronot
Swampert
almost every water Pokemon
pokemon ruby, saphire, and emeraldyj
in mossdeep
That would be Rayquaza.
It is in the Hoenn region =]
you don't.
only in Japanese version.
No. (lol)~S4CR3D W0LF
In the Cave of Origin.
its in mauville city