Alot
It must be traded to you from emerald or Pokemon colosseum.
Meditite can not be obtained in Pokemon Emerald. It can be traded from Ruby/Sapphire/colosseum/or XD.
You can't. It must be traded from FireRed or LeafGreen.
Has to be traded from LeafGreen/Colosseum.
You can't. It must be traded from FireRed of LeafGreen.
Latios can be traded to Colosseum from Ruby, or Emerald.
Magmar is unavailable on Pokémon Emerald. He can be traded in from other games, or you could cheat...
The Growlithe cannot be found in Pokemon Emerald but you can trade it fromPokemonFirered.growlithe cannot be caught in emerald, Sapphire or ruby. it must be traded from fire red
There are 386 Pokemon in the game. Some Pokemon aren't available to capture in the game, including some that have to be traded from other games, and event legendary Pokemon.
All Pokemon from Kanto, Johto, and Hoenn can be obtained in Emerald. Susrskit, Masquerain, Meditite, Medicham, Roselia, Zangoose, and Lunatone must be traded from Ruby or Sapphire. Other Pokemon like all of the starters must also be traded over.
Shaymin was only introduced in the 4th generation games (diamond, pearl, and platinum) and cannot be found or traded to Pokemon emerald.
You can't, it must be traded from ruby, sapphire, or emerald.