Hoenn Legendary Pokémon cannot be found in Pokémon White.
Chat with our AI personalities
volcarona may not be considered to be a legendary as it does infact evolve from a Pokemon called larvesta, but the Pokemon volcarona is considered to be a legendary Pokemon.
No, there are no legendary Pokemon there, just a rare item.
No
You can't catch Dialga in Pokemon White. After you beat the the Elite 4, you can use the PokeTransfer to receive a Dialga from Pokemon Diamond, or Platnium.
The only legendary that can be in an Egg is Phione, which you need to breed Manaphy with a Ditto. But other than that, you can't get any Legendary Eggs.