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.
Keep the egg in your party and cycle around for a few minutues
Chargestone Cave from Professor Juniper and Route 13.
If you mean Larvesta, then in a house from someone on Route 18.
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.
Have a Pokemon with Flame Body or Magma Armour in your team, this halves the hatching time.
on route 18,in a house a girl gives you a larvesta egg and he evolves in to volcorona
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!