There is no colosseum in fire red.
No you don't need too
Key items are impossible to trade or remove, except to Pokémon Colosseum.
trade him from Pokemon gale of darkness for game cube or Pokemon Colosseum or fire red leaf green.
You have to trade an Ursaring from Emerald, Colosseum, or XD if you want an Ursaring on Fire Red.
Hoothoot is not available in firered you will need to trade one from Emerald or Colosseum.
you cant get it unless you trade from fire red or colosseum sorry :(
Murkow can't be found in the wild in Sapphire version. You have to trade from Fire Red or Colosseum.
You can only get Jirachi from the Pokemon colosseum bonus disc.As for Deoxys, you need to trade it off fire red or leaf green
You cannot catch/see 'Entei' in Pokemon Ruby. The only way to get it to Ruby is to trade it from Leaf Greean, Fire Red or Colosseum.
You need to get something that connects your Game Cube to your GBA. There should be a place available after completion of the game where you can trade from colosseum to Ruby Saphire and I think Fire red Leaf Green and Emerald.
Migrate from fire red leafgreen emerald or colosseum