its good to use evolution stones as they make you're Pokemon stronger, but use them carefully, there are only a limited amount of each stone in the game.
Thunderston Water stone Firestone
Vibrava evolves into Flygon at level 45, and does not use any evolution stones.
You go to your bag and select one of the evolution stones you have, then you select "Use" and the screen will go to your Pokemon party. Then you select the Pokemon that is able to use that particular stone to evolve. If you don't have any of the particular Pokemon that uses evolution stones to evolve, it won't work.
Stones are good for health
You can buy evolution stones at the Celadon City Department Store on the 4th floor.
In Pokémon Crater, to use evolution stones, first, open your Pokémon inventory and select the Pokémon you want to evolve. Then, choose the appropriate evolution stone from your items. Once selected, confirm the use of the stone, and if the Pokémon can evolve with that stone, it will evolve immediately. Make sure to check the specific evolution requirements for each Pokémon to ensure compatibility with the stone.
you have to trade for alot of them, train alot of them to evolve, and use evolution stones.
Evolution stones are used to evolve certain Pokemon.
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.
If you mean evolution stones. You can buy them at the shop in Celadon
underground