you can not! if you trade with ozers only!
Torchic, Mudkip, and Treecko
The three starters: Mudkip, Torchic, and Treecko.
Only emerald can get a johto starter however you can trade the johto shadow Pokemon from Pokemon colosseum then breed them in sapphire to get the johto starters you can also trade the johto starters directly from Pokemon xd gale of darkness.
Kanto starters are not available in Sapphire you'll need to trade them from Firered or Leafgreen.
Pokemon sapphire for starters but on the main Pokemon Diamond and pearl Pokemon Mystery Dungeon Explorers of Sky is.
You cant get a kanto starter on Pokemon sapphire but if you have Pokemon emerald then you complete the pokedex then you get a choice of starters from the johto region. I hope this helped.:)
If I''m correct, they are Cyndaquil, Chicorita, and Totadile. (Don't quote me on that.)
You can only receive the other starters from other ruby sapphire or emerald players you can't catch starter Pokemon ever.
If you are talking about the starters..then,U are able to pick from Torchic,Treecko,Mudkip.
Just migrate from the past games Pokemon leafgreen/firered or ruby/Sapphire/emerald. Then you will have them all.
You'll just need to trade for them, or transfer them into the Pal Park from Pokemon Ruby, Sapphire, or Emerald.
Obtain 200 Pokemon in Pokemon ruby, sapphire or emerald, then go to professor birch and you get to choose one of the johto starters, then you migrate the starter you chose to Pokemon, diamond, pearl, or platinum.