How do I breed pokemon on Pokemon Diamond/Pearl?

Question

How & can you breed a Palkia?

Answer 1

Simple:
get a male and female pokemon of the same egg group. The resulting egg will be the same as the mother.
If you don't have a female pokemon, get a ditto since ditto + pokemon = pokemon
If you want to breed a good pokemon with nice move sets, the pokemon will learn the moves from the dad.
Lastly, Legendaries cannot breed. Only one I know that breed is manaphy with ditto and resulting egg is phione.

Answer 2

one wise word ditto GET IT FROM POKEMON EMERADE (note:in pokemon emerade u must defelte the elite 4 then go in a hidden cave where dittos n loudern r )but u might not be able to breed a legendery!!!!!!! daycare put 2 differant gender of pokemon(note:ditto can breed with any kind)in the daycare wait for like a day or more then an egg shall appear. get the egg travel with it(takes a long for it to catch)u need to walk alot though.(for it to catch)