the best Pokemon in Sapphire is deoxys... this is how you get him:) first beat the Pokemon league then get latios go to YouTube if you want to find that out...
go to the spacestation then talk to a man next to a window he will say a number train you latios to that level then talk to him
Swampert
its not the best but it can help you find the regi's on emerald and ruby & saphire
you cant go to mars on pokemon saphire you can only go to mars if you were a astronot
almost every water Pokemon
pokemon ruby, saphire, and emeraldyj
torchic - absol - spheal the regis - allways leave a empty space in your party.
in mossdeep
That would be Rayquaza.
It is in the Hoenn region =]
you don't.
only in Japanese version.
In the Cave of Origin.