yes
Yea, it halfs the amount of steps you need to take, but you have to have the egg and Marcergo in your party at the same time.
yes
using action replay codes also hatching from eggs.
No,but there sort of is for hatching eggs
a pokemon with flame body will double the speed of hatching an egg
happiny and riolu
Eggs hatching
There are no Shuppet eggs in Pokemon Diamond.
no
you get them at solceon town
By leveling up your Pokemon from eggs.
Your female pokemon,and your ditto and male can have eggs.You can get eggs at the pokemon day care in Soloceon town.