To get all three Starters in Pokemon Emerald you need to trade for them with Pokemon Ruby, Sapphire or Emerald. This is a mechanic used since the creation of Pokemon to encourage players to get together and trade.
You can first collect all of the Pokemon for the hoen dex in Pokemon emerald you will get 1 of the 3 Pokemon gold/silver/crystle series starters then use the get all of the starters trick to get them all then migrate them to Pokemon diamond or pearl.
All 3 Johto starters cannot be obtained Leafgreen you must trade them from Emerald, Colosseum, or XD Gale of Darkness.
i think you have to complete it and birch will give you one
Treeko>grovile>septile torchic>combuskin>blazkin mudkip>marshtomp>swampert.
all 3 starters in last evolution lvl 100 metagross lvl 100 salemance lvl 100 wailord lvl 100
i assume you mean the 3 starters?? by trades
1. Milotic 2. Salamence 3. Flygon
You cannot get all 3 Starter Pokemon (Torchic, Mudkip and Treecko) in Pokemon Emerald without trading for 2 of them.
when you get all 202 Pokemon in emerald the proffessor will give 1 out of the 3 starter Pokemon in Pokemon gold and silver.
They are actually all 12 starters. You can only choose 3 starters.