Impossible. You'd have to trade to get all 3.
You cannot get all 3 Starter Pokemon in Pokemon Emerald without trading for the other 2.
You cant without action replay
You can't unless you picked it as starter pokemon.
its simply not possible
It is impossible to get all three starter Pokemon in one game without trading, unless you are willing to use an Action Replay.
There is no other way.
Not without trading from another game.
You don't.
you cant sorry - Raymond laduke
The only other way is to cheat.
Defeat all gym leaders in jounto and kanto then deafeat red and you can get another starter pokemon
You get it as your starter Pokemon or use action replay