After they are purified and you gain the ability to trade, yes. I purified my shadow Lugia from XD, traded him to Sapphire, and then migrated him (with 5 others) to Diamond. Moving him to Diamond was a one way move though... you can't trade from older games, you can only import.
No, Shadow Pokémon cannot be traded. == ==
this depends on which game you are referring to. there are different ones for Colesseum than in XD: GoD (this one has more)
Yes. They are the only types of Pokemon that you can catch in Pokemon Colosseum and the other Pokemon game for GameCube (I honestly don't know the name).
yes, you can, traded, or purifyed
Shadow Pokemon cannot be traded unless they're purified.
theres no shadow mightyena on Pokemon xd but there is a shadow pochyena
You can get shadow Pokemon from battling Mirror B
a shadow Pokemon is mad with power and can't controle itself,while a normal Pokemon can.
yes, you can, traded, or purifyed
Shadow Pokemon cannot be traded unless they're purified.
There is no such thing as a Shadow Pikachu. Shadow Pokemon were only ever a Gamecube thing (and could only be traded away from XD and Colo once purifed.)
Shadow Lugia in Pokémon XD Gale of Darkness not be traded to other Pokémon games while it is a Shadow Pokémon. Shadow Lugia must be purified so that it would revert back into a regular Lugia before it can be traded to other Pokémon games.
You can't. It's only obtained in Pokemon: Gale of Darkness and can't be traded to any other Pokemon games.
Yes, it can be traded. Every Pokemon can be traded. Pokemon can be traded even if they have already been traded. No Pokemon is stuck with one person.
The only way to get a shadow Lugia is by catching it in Pokemon XD: Gale of Darkness. It's level 50 and can't level up or be traded unless it's purified and in its original form.
a Pokemon that has to be traded to evolve can be any lvl you want it to be you get it the Pokemon the same lvl that your Pokemon was it does not grow a lvl when it is traded
There is not shadow Pokemon card but there is dark Pokemon cards.
theres no shadow mightyena on Pokemon xd but there is a shadow pochyena
Shadow Pokemon have the door to their hearts closed.
Shadow Lugia is a fake pokemon. You can not obtain a Shadow Lugia in any Pokemon Game (so far). Shadow Lugia is just another rumor pokemon.