no you cant!!!!
No.
You can breed Manaphy with a Ditto to get Phione.
No legenedaries can lay eggs ._.
Your female pokemon,and your ditto and male can have eggs.You can get eggs at the pokemon day care in Soloceon town.
i have Pokemon diamond, and played 600 hours. its not possible. but you can catch a ditto, and make Pokemon eggs.
you accually need to have manaphy and a ditto, put them together in the day care and they will produce phoine eggs (manaphy cannot be found in Pokemon diamond)
it is impossible except for when you have cheats in Pokemon pearl,platinum,diamond
all Pokemon except legendarys. put 2 Pokemon same species opposite gender or a ditto and any Pokemon in the daycare
Dialga and Palkia are the legendary Pokemon mascots of Pokemon Diamond and Pearl respectively. As they are legendary Pokemon, they cannot be bred to produce eggs.
Any Pokemon can breed with Ditto unless they are legendaries.
As far as I'm aware, legendaries cannot lay eggs, it's why they're genderless. Actually, the answer above me is not true. As of Pokemon diamond, pearl, and platinum, as long as they are the same personality (such as Bashful or Shy), any legendary Pokemon can breed with a ditto in the daycare. This ma take a while, though. It did for me.
There is no one Pokemon who lay eggs. Ditto can be used with any other Pokemon to breed, and if you have 2 Pokemon in the same egg group, that may work too. I prefer Ditto as it can pretty much breed with any Pokemon. BTW they don't have babies, they lay eggs. =3