Dark Diamond was created in 2001.
You can not get dark Pokemon on Pokemon diamond and pearl
You Were a Diamond was created in 1998.
NO!NO!NO!NO!NO!NO!NO!NO!NO!
You can't. There is no such thing in any legit version of Diamond or Pearl.
Dark Lugia is also known as Shadow Lugia. You can get it in the game Pokemon XD and it is possible to trade it over to Diamond version.
My Brightest Diamond was created in 2006.
Diamond Nights was created in 2003.
Diamond Building was created in 1972.
The Diamond in the Fish was created in 1996.
Diamond Records was created in 1961.
A Diamond Guitar was created in 1950.
The Diamond Mine was created in 2005.