Collect 15 Blue Shards underground and trade them.
Exchange Blue Shard with the Waterstone. You'll find waterstone in Abandoned Ship, too.
underground
Dig it out in the underground.
you cant find lugia on diomand or pearl
Team Galatic's HQ.
solitary man-neil diomand
You can buy it at the Cleadon department store
You can find it somewhere or you can go underground and dig it up.
Tim Waterstone was born in 1939.
You can find all the stones while digging in the underground, or you find them in the Solaceon (Unown) Ruins. There are several empty rooms in the ruins with single rocks in them. Use your item finder on your Poketech and you'll find a Thunderstone, Firestone, and a Waterstone. Hope this helps!
Yes, you can dig up a waterstone in Pokemon platinum underneath the resort area.
You must evolve the Eevee you get from Celadon City with a Waterstone.