Yes, the everstone.
Causes Evolution; Fire Stone Leaf Stone Water Stone Thunder Stone Moon Stone Sun Stone Dawn Stone Shiny Stone Dusk Stone Prevents Evoltion; Everstone
The evolution stones in Diamond/Pearl/Platinum are the water stone, fire stone, thunder stone, moon stone, leaf stone, sun stone, dusk stone, shiny stone, and dawn stone. (Sorry if I missed one) And even though this is the opposite answer, the stone to keep Pokemon from evolving (with or without evolution stones) is the everstone. Hope this helps! :)
I am not sure but I think it is hidden somewhere
You level it up/you evolution stone.
You can't find it in the wild because its a stone evolution.
None. An everstone is a stone that prevents evolution. It needs to be held for its effect to take place.
Causes Evolution; Fire Stone Leaf Stone Water Stone Thunder Stone Moon Stone Sun Stone Dawn Stone Shiny Stone Dusk Stone Prevents Evoltion; Everstone
Evolution
Evolution stones are used to evolve certain Pokemon.
the Pokemon roserade (evolution of Roselia and Budew) evolve with shiny stone.
evolution stone
The evolution stones in Diamond/Pearl/Platinum are the water stone, fire stone, thunder stone, moon stone, leaf stone, sun stone, dusk stone, shiny stone, and dawn stone. (Sorry if I missed one) And even though this is the opposite answer, the stone to keep Pokemon from evolving (with or without evolution stones) is the everstone. Hope this helps! :)
To stop the evolution without using an ever-stone press ''b'' during the evolution to startle the Pokemon and leave it in it's current status
the fire stone,moon stone, or any other kinds of stones
You level it up/you evolution stone.
I am not sure but I think it is hidden somewhere
you use it on some water type Pokemon to evolve them. example:pikachu+thunder stone example:polywhirl+water stone example:evee+fire stone example:Roselia+sun Stone example:murkrow+dusk stone a ever stone prevents your Pokemon from evolving