Celebi is Pokemon number 251, and has a pink or green appearance depending on which version you happen to catch. This type of Pokemon is said to have time traveling abilities, and favors forested areas.
However, Celebi is not available in all “Pokemon” games, much to the chagrin of die-hard fans of the cute little monster. Sadly, for those players who own “Pokemon Colosseum”, there is not way to catch Celebi in-game. That being said, that doesn’t mean it is possible to use a Celebi in “Pokemon Colosseum”.
There are a couple of ways to do so, which I will outline below. Be forewarned, however, that you might not find the effort required to get Celebi in game is worth the reward.
Import the Japanese version of “Pokemon Colosseum“. When customers in Japan pre-ordered this version of the game, it came with a special bonus disc that allowed users to download Celebi into the game. Some importers will import both the game and the bonus disc, but some will only import the game itself, so make sure to read the listing carefully. You will then need to consult a guide on playing import games on your US-based system, a number of which can be found with a quick Google search.
Post a message on Craigslist or a Pokemon Fan Forum (such as the one at www.pokedream.com) seeking someone in your area who may be willing to trade or sell their Celebi to you. You can use the trade machine as usual with them.
Kidz World: Pokemon Game Cheats! Evolve Seadra and Capture Celebi! [http://www.kidzworld.com/article/5389-pokemon-game-cheats-evolve-seadra-and-capture-celebi] Serebii: #251 Celebi [http://www.serebii.net/pokedex-dp/251.shtml] IGN Cheats: Pokemon Colosseum [http://cheats.ign.com/ob2/068/566/566822.html]