That dependes on what kind of Pokemon is in the egg.
A good site to look how long it takes is: http://Pokemon.marriland.com/diamond_pearl/pokedex
Just click a Pokemon or search one up and it will be there in 'steps to hatch'.
A bad egg comes to be if you've hacked your Pokemon with action replay or something like that. It never hatches, and you can't battle or trade with your freinds
A Pokemon adventure on Pokemon Diamond Verison can last forever if you wanted it to.
as long as you want
I'm not really sure, but I know a Pokemon egg hatches once you take a certain amount of steps.
yes heres how to get it you need ditto and manphy go to solaceon town put them both in and wait a while or just switch your app to Pokemon day care app and if there is a egg then get it and walk 2000 milloin miles and it hatches (just jokeing it will hatch at any time but its very long!
The egg was probably left in the PC for a long time and got a pkrs. It's like a virus for Pokemon's who are left in PC's for a long time. I heard that bad eggs hatches into any Pokemon, except the pearl and diamond version. But i dotn know if it's true or not. Try checking it out. You should hatch your egg first once u get it.
To catch every Pokemon, you need action replay for the few last diamond legendaries. You will need Pokemon fire red/leaf green and emerald. Migrate them to Pokemon diamond. In Pokemon diamond, fill up your pokedex by catching Pokemon normally or with poke radar, or use gts. It will take a long time to catch all Pokemon
the really long grass in resort area no pokeraider
Theres no way
pay me
no just as long as your underground
in four hundred years