I think so.
Sorry, NOPE.
sorry to dissapoint you but you cant unless you trade Pokemon with someone who has 1 or you migrate from silver version on gb.
The Colosseums are... The Gateway Colosseum, the Main Street Colosseum, the Waterfall Colosseum, the Neon Colosseum, the Crystal Colosseum, the Sunny Park Colosseum, the Magma Colosseum, the Sunset Colosseum, the Courtyard Colosseum, and the Stargazer Colosseum.
The final Colosseum is the Deep Colosseum after the Game, Pokemon here are Level 60-65, this is where you can catch the Pokemon you missed from the Admins earlier and a Shadow Shuckle.
Its of course a matter of opinion, but on handheld I say Pokemon Silver/Gold and on TV console I'll say Pokemon Colosseum.
if you can connect colosseum to a gba, then trade the Pokemon to the gba game and migrate!
If you pre ordered Pokemon colosseum you got a bonus disc that you could get jarachi and put it on ruby/sapphire
Colosseum is a game for the Nintendo gamecube.
pokemon do not evolve on pokemon colosseum
you can't
You don't get either in firered, to get lugia and ho-oh get them from Pokemon colosseum and Pokemon xd gale of darkness.
Leafgreen can only trade between firered, ruby, sapphire, emerald, Pokemon colosseum, Pokemon xd gale of darkness, and migrate with diamond, pearl, platinum, heartgold and soulsilver it cannot trade with the original silver.