Legendary smith problems

Everything is explained on the FF3 Legendary Smith wikia page, especially:

Finding the Smith

Restore Princess Sara's Pendant

The party will receive a message from Princess Sara about her pendant (the player will have to check Mognet as Ingus), and the player must visit Castle Sasune: East Tower to Princess Sara's room and she will give the player the pendant. It has recently become broken, and needs repairing.

The party then needs to visit Takka to have it repaired and he will claim it is beyond his abilities. Regardless, in his mail (which the player will have to check Mognet as Refia) he informs them of the Legendary Smith whom they must find in North Western Saronia. She repairs the pendant and in return she asks the party to find her some Orichalcum. Return the pendant to Princess Sara in her tower.

Find Orichalcum

Check Mognet as Luneth to find a message from Cid titled "Something in the Basement...". Visit Cid in Canaan and talk to him to hear about the monster. Head down to Cid's basement and defeat the Aeon to collect an "Unknown Metal". Talk to Cid once more and he'll identify it as Orichalcum.

Now take the Orichalcum to the Legendary Smith, in Falgabard, after unlocking the door in Eureka. Upon giving her the metal, she will provide the Ultima Weapon, and wander the world.

A list of locations is also available, where you can find the Legendary Smith:

- Ur - Inside the well.
- Castle Sasune - The East Tower's third floor.
- Healing Copse - The grove just before Tozus.
- Village of the Ancients - The Inn.
- Gysahl - Inside the Chocobo stable.
- Replito - A northern house.
- Dwarven Hollows - The entrance to the Subterranean Lake.
- Saronia Castle - The basement.
- Doga's Village - The central island.
- Ancient Ruins - The Inn.
- Saronia Castle - The hidden passageway in the left area where the two Black Mages are.