By using expoler kit and go underground and start diging.
You can find everstones underground
In Dewford at the cave, Not hard to find.
you can find many everstones when digging for treasure underground
You cannot buy them, however you can get them in granite cave.
If they would evolve normally, yes. NOTE: The evolution of Kadabra into Alakazam is unaffected by Everstones if the game receiving the Pokémon is Diamond, Pearl, Platinum, HeartGold, or SoulSilver.
try this code 82740BAB 4B17FE38
no but you can get one in fire red and leaf green.
Pokemon diamond
You can find(fire,sun,water,leaf,andthunder)stones,revives(max revives too),heart scales,everstones,hard stones,(red,blue,yellow,or green)shards,(heat,and icy)rocks,and star pieces
Usually, Rogenrola holds everstones, so if you want it, I suggest you catch a lot of rogenrolas until one of them has it.
Pokemon diamond Pokemon diamond Pokemon diamond
you cant be a Pokemon in Pokemon diamond