You can buy Pokemon XD from almost any retail store such as GameStop and Walmart as well as other game stores additionally you can buy it online either via ebay or Amazon.
At GameStop it goes for roughly $12.99, Pre-Owned. You can currently purchase Pokemon XD for as little as £19.99 from Amazon.co.uk this is the cheapest available over the net except for ebay.
There is no under in Pokemon Xd, there is in Pokemon Colosseum
Pokemon xd in my opinion
Pokemon XD is a Pokemon game for Nintendo GameCube.
You cannot snag a legit whismur in Pokemon XD, only trade to Pokemon XD from another game.
i would say xd because it has more Pokemon available
It depends on the Gamestop. Some will buy Pokemon cards, but some won't.
Pokemon XD (XD: Gale of Darkness) is for the Nintendo Gamecube.
There is no way to trade directly from Pokemon XD to Pokemon Coliseum. Instead trade from Pokemon XD to one of the GameBoy Advance versions of Pokemon, and then trade to Pokemon Coliseum.
Gamestop, Best Buy, any store that usually sells video games. It may be hard to find because some stores don't have a lot of Gamecube games.
You can only get celebi in Pokemon XD by trading. The only way I know you can get a celebi to Pokemon XD except from events is the Pokemon Colosseum Bonus Disc.