Ohhh, I never got the chance to play Colosseum myself. XD I always wanted to since it seems really interesting, but there aren't that many Gamecube games sold here. And yeah, seeing as it was the original aim of Pokemon, it's always an awesome feeling when you finish it.
Ooh, how did you get it? Yeah, they've done a good job making it more accessible, but it's ironic because the merit of shinies is their inaccessibility. But hey, the more shinies to go around, the better, right?