an pokemon egg
You canot a dialga egg in pokemon black and white.
No.
You walk, run or Bike with the egg on your team.
Well on Pokemon black and white there is a mystery egg event.
No one knows. Because no one saw it
Legendary Pokemon cannot be breed.
you will get larvesta, a bug/fire type pokemon.
The Pokemon hatched is LARVESTA, the bug/fire Pokemon.
Train with the Lucky Egg (1.5x EXP) or Trade to another game with the Lucky Egg.
yes if you breed one with a ditto they can make eggs
You get it in an egg on route 17 or 18