Larvesta
You get a Larvesta which evolves into a Volcarona
It depends which kind of egg it is.
You can't, It is only obtainable in Pokemon Black or White. But if you want one in Black or White, a Pokemon ranger will give you an egg of a Larvesta in Route 18 so remember to make room for it!
If you mean breed, then yes you can at the day care on route 3. leave 2 compatible pokemon and boom you got an egg. (the species will be the mom's species) just walk around a lot for the egg to hatch.
you get from Mr. Pokemon in route 30.
You get it in an egg on route 17 or 18
You get a Larvesta which evolves into a Volcarona
It depends which kind of egg it is.
If you mean Larvesta, then in a house from someone on Route 18.
Chargestone Cave from Professor Juniper and Route 13.
Keep the egg in your party and cycle around for a few minutues
Surf to the west off of route 1. There is a building a little way out there where you can get a moth egg.
You can get it in an egg on route 13 (behind Numeva Town) in a house on an island.
Talk to the daycare man in route 34 and he will give you an egg. wait for it to hatch and then evolve it.
on route 18,in a house a girl gives you a larvesta egg and he evolves in to volcorona
Have a Pokemon with Flame Body or Magma Armour in your team, this halves the hatching time.
You can't, It is only obtainable in Pokemon Black or White. But if you want one in Black or White, a Pokemon ranger will give you an egg of a Larvesta in Route 18 so remember to make room for it!