Pokemon Ruby has Pokemon that Pokemon Sapphire does not and Pokemon Sapphire has Pokemon that Pokemon Ruby does not.
There is no Pokemon mansion in sapphire.
There used to be a special event that you could go to where the people of Game Freak download special data into your game cartridge that would allow you to encounter Jairachi, but that event's over with. But don't worry. Jairachi isn't needed to complete the pokedex, and isn't even that good of a Pokemon to begin with. Believe me; I know.
He is not in Pokemon: Sapphire. You will not be able to find him. He is in Pokemon: Diamond, Pokemon: Pearl, and Pokemon: Platinum. You will definitely have trouble finding him in Pokemon: Sapphire.
Evee is not availiable in Pokemon Sapphire.
Any Pokemon in sapphire but you have to migrate
sinnoh Pokemon won't appear in Sapphire version!
You cannot get Regigas in Pokemon Sapphire as it is from the next generation of Pokemon
All Pokemon in Pokemon sapphire can breed. Except for all legendaries.
Not in sapphire.
There is not a bike voucher in Pokemon sapphire
Lucario isn't in Sapphire,Sapphire is a Hoenn pokemon,Lucario is a sinnoh pokemon.