There is a King's Rock hidden somewhere in Celestic Town - the left ledge of the pit in the town centre, if I remember correctly; use the Item Radar.
It can also be found (rarely) with the Ability Pickup by a Pokemon of a level from 11 to 30.
a grass Pokemon
i think eevee
happini can evolve with a oval stone
you cant get one
if you have a pokemon with strength use the move to push the stone into pit
You don't get the magna stone from buck in Pokemon platinum.
It does not evolve with a dusk stone in Pokemon Platinum
there is no bronze stone
The Pokemon that can use oval stone in Pokemon platinum is Happiny. It is the pre evolve form of chansey. Mostly every chansy you catch have a oval stone.
a grass Pokemon
eevee
Happiny evolves into Chansey with an Oval Stone.
underground
underground
toolmon obviously
i think eevee
you can find a thunder stone by checking the UNDERGROUND