To hatch an egg you just have to walk while you have it in your party, it takes a certain number of steps to make it hatch.
riolu
get a magcargo and put next to the egg in ur Pokemon thing
Happiny.
all Pokemon have a different amount of steps for the egg to hatch. if you them to hatch run back and forth. it will say "what?" and then ur Pokemon will hatch. it will be lvl 1.
It depends on what Pokemon will hatch from the egg. Different Pokemon need different number of steps to hatch.
The egg that Cynthia gives you will hatch into a Togepi.
Pokemon eggs hatch pokemon. Yoshi eggs hatch Yoshi's.
it will hatch a certain time after you walk
It is an ability that helps hatch eggs. If you have a Pokemon in your party while carrying and egg, the egg will hatch faster.
It's impossible to hatch a BAD egg.
Yes. An egg will hatch in any area of the game.
If you're asking "will an egg laying Pokemon hatch their eggs", then no. You have to get the eggs from who owns the Pokemon and you have to run around so it'll hatch.