You cant,you have to cheat or trade it from another game
You need a game shark
You cant, Only you can use a Game Shark.
You can only ever have one starter in any game (unless you cheat)
By using a cheat code. TOTALLY against the cheat codes. The name of the code is I believe a game shark.
yes you can trade pokemon leafgreen pokemon to pokemon emerald version same as pokemon fire.
You would use the game shard or the action replay depending on which version you have
you cant because leafgreen is an older game then Pokemon pearl plus its a gameboy advance game.
press new game
you cant catch celebi in the gba games except with a game shark cheat system
Not in the game.
Pokemon FireRed/LeafGreen