you talk to a guy in the south east of hearthome city a level 1 (of course) happiny will hatch.
you run around sinnoh and it will hatch.
run around
Yes
You have to walk around with it. It will hatch faster if you have a Pokemon with the ability Flame Body.
you can't hatch a pikachu egg on diamond, it hatches in to a pichu.
you walk around for ages and ages and it will eventually hatch
You have to have the egg with you and walk several thousand steps.
I don't think there is!
It depends on the Pokemon you are hatching.
pay me
Breed a Loudred and hatch the Egg
No