You need the National poke'dex
You can find evolution stones is various places. If you have beaten the Elite Four, go to the Pokeathlon Dome. In the prizes section, there will be evolution stones. Compete in competitions to earn enough points for the one you want.
You can buy evolution stones at the Celadon City Department Store on the 4th floor.
If you mean evolution stones. You can buy them at the shop in Celadon
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! :)
OVAL STONES CAN EVOLVE- A HAPPINY TO A CHANSEY THUNDERSTONES- Can EVOLVE A PIKACHU TO A RAICHU DUSK STONES-EVOLVE MISDREAVUS TO MISMAGIUS OR MURKROW TO HONCHCROW
You can find evolution stones is various places. If you have beaten the Elite Four, go to the Pokeathlon Dome. In the prizes section, there will be evolution stones. Compete in competitions to earn enough points for the one you want.
You can get all evolutionary stones by buying them from the Pokeathlon Shop to the right of the pokeathlon entrance.
You can trade athlete points for most of them in the Pokeathlon dome north of goldenrod. Also you can get more from bill's grandfather on Rte 25 by showing him the Pokemon he asks for.
You can buy water stones in the Pokeathlon with your points.
here's how you get stones before you achieve the national pokedex- you can win the bug contest, and they are also often prizes at the pokeathlon.
Evolution stones are used to evolve certain Pokemon.
You can buy evolution stones at the Celadon City Department Store on the 4th floor.
If you mean evolution stones. You can buy them at the shop in Celadon
If by stones you mean evolution stones, there are many different ways: The main way is to purchase them from the Pokeathlon or to win a Bug Catching Contest on Tuesday, Thursday, or Saturday. More evolution stones become available after you defeat the Elite Four and get the National Dex. Another way is to find them randomly around the two regions of Johto and Kanto. A third way inside the game is to receive five stones from Bill's Grandfather by showing him five different pokemon. Or, if you have Diamond, Pearl, or Platinum, you can find the stones in the underground and transfer them, while equipped to a pokemon, to the game.
click pokemart
Fire Stone: Obtain on Tuesdays in Pokeathlon Athlete Shop. Water Stone: Obtain on Wednesdays in Pokeathlon Athlete Shop. Thunderstone: Obtain on Thursdays in the Pokeathlon Athlete Shop. (All for 2500 points) Other Stones: Obtain from being First Place in Bug Catching Contest, which are held on Tuesdays, Thursdays, and Saturdays.
Yes you can. You can go to the Pokeathlon Dome and at the athlete shop, if you have enough points, you can buy some.