You canot a dialga egg in Pokemon Black and White.
you can't catch dialgas anywere
You are able to obtain dialgas' picture after you encounter it
palkia
In the National Dex.
Dialga has no evolution stage.
you cant
Yes but only if you trade or have an AR.
The Little Black Egg was created in 1965.
It means the baby is about born or the baby died during the escape of the egg
A cobra egg is black and has yellowish stripes.
she is an egg layer
You cant get a egg you have to breed it with a ditto