You can't. You need a Nintendo Gameboy Advance/SP and a Gamecube<-->Gameboy Advance game-link cable
Colosseum is a game for the Nintendo gamecube.
It must be traded to you from emerald or Pokemon colosseum.
Neither of these games are for the Nintendo Game Boy Advance hand held system.
Trade pineco from emerald or colosseum.
Ruby, sapphire, emerald only by wireless adapters, another firered, leafgreen and Pokemon colosseum and Pokemon xd gale of darkness.
You must get it from a Nintendo Event or the Pokemon Colosseum bonus disk.
Colosseum is a game for the Nintendo gamecube.
you went to a Nintendo event to get it on your FireRed/ LeafGreen or Emerald version OR you could get it from colosseum.
You trade from Pokemon Colosseum
pokemon colosseum
Trade from Pokemon colosseum
you have to trade him from Pokemon ruby or emerald.
If you mean "how can I get Johto Pokemon into Pokemon Emerald", then you can do that by either catching them in-game (as far as I remember) after completing the main Pokedex. The three Johto starters can be obtained once you complete (catch) all Pokemon in the regional Pokedex. You can also transfer their second (or third-) stage evolutions from Pokemon Colosseum via GameBoy Advance-Nintendo GameCube link cable. You need to finish the story in Colosseum for this to work, however. If you mean "how can I transfer Pokemon from HeartGold/SoulSilver/Gold/Silver/Crystal to Emerald", put simply, you can't. Sorry.
You can but only from trading with Pokemon emerald or Pokemon colosseum.
The only way to get it is from Pokemon emerald or Pokemon colosseum.
It must be traded to you from emerald or Pokemon colosseum.
Not at all mew is an event Pokemon for Pokemon emerald.