lombre and staryu.
only vapreon
all i kno r vaporeon and poliwrath
you use a water stone
Exchange Blue Shard with the Waterstone. You'll find waterstone in Abandoned Ship, too.
Poke'athalon
I know poliwhirl will evolve to poliwrath and that shelder will evole to cloyster with the waterstone
You can buy one with Athlete Points at the Pokeathlon Store on some days, or you can get a Waterstone from Bill's grandfather after you show him a certain Pokemon.
buy it in celdon city
Dig it out in the underground.
Its evolve to Vaporeon from eevee
You Need A Waterstone.
You can buy them at Celedon's Department Store.