You can't find metagross you must train a beldum which you can get from steven's house.
you need to catch a beldum on route 228 and get it to level 20 to evolve it into metang then level it up to level 45 to get a metacross
after you have beaten all the missions go to the go rock squads base in the sekra range(you wil need 2 tangelas to get there)go in the base and you will find metacross at the far end of the base. You may have to fight him with 2 beldums.
fight with: purple eyes or red eyes on Mt. Layuda. I don't realy know who it is... red or purple eyes let you fight with metacross. catch and that's it!
You have to evolve your metacross who is the evolved form of beldum.
you can find minum in sapphire in lots of places
You cannot find a Manaphy or a Phione in Sapphire since it's from generation 4 and Sapphire is a generation 3 game.
There is no mist stone in sapphire.
Sadly, you can't catch Groundon is the Sapphire Version, however you can in the Ruby version, you will find him in the same place you find Kyorge in the sapphire version.
My team: -Espeon -Metacross -Swampert -Arcanine -Salamence -Raichu
Lucario isn't in Sapphire,Sapphire is a Hoenn pokemon,Lucario is a sinnoh pokemon.
No, you can't find Teddiursa in Pokémon Sapphire, only in Emerald.
you can't find it in Pokemon sapphire, but you can find it in Pokemon ruby. Hope this helped. :-)