Yes but Pokemon xd gale of darkness is a lot funner because there are special game modes that are set aside from the actual game like battle bingo and battle CD's on top of that you can capture wild Pokemon!
NO you can not play Pokemon emerald in Coloseum.
umbreon and espeon
Pokemon colosseum is another Pokemon game.
You have to purify every shadow Pokemon
Yes.
you have to beat every set in the stargazer coloseum. Also every coloseum.
Moltres cannot be found on Pokemon Coloseum.
jerichi is the only 1
Coloseum bonus disc for game cube.
No, there won't be a Wii version of Colosseum.
You can get croconaw, bayleef and quilava.
heres some info on how to turn u Pokemon coloseum in to Pokemon xd gale of darkness just play Pokemon coloseum and beat it.then beat mt battle then go to the title screen and delet your acount.while its deleting your acount turn it off then wait 1 week and play it and your Pokemon coloseum will be Pokemon xd gale of darkness and when you make a acount you will have a lugia at lv100. hope it helped