In order to catch your legendary Pokemon in Pokemon Sapphire, save your master ball For Rayquaza...you can catch KYogre/Groudon/both with either an Ultra Ball or Timer Ball.
at mt. pyre
Sadly, no. The creators of the game forgot to add in the Pokedex, so trading is impossible without GameShark. :(
Evolve Snorunt. Snorunt can be found in Shoal Cave Ice Room
Have a ruby or another sapphire trade you a legendary!
Tornadus, Landorous, Reshiram, Virizion, Terrakion, Cobalion, Kyurem, and Victini.
it is the main legendary in sapphire
you can't get the black flute in leaf green but you can in Pokemon ruby, sapphire and emerald then trade it to leaf green.
Magikarp
Yes. Kyogre is the main legendary Pokemon in Sapphire.
Kyogre
Some legendary Pokemon in saopphire are rayquaza, groudon, kyogre
none