How do you get a electric stone in crystal version?

You can't get an Electric Stone in Pokemon Crystal. It's not available in that game.

Electric Stones are used to evolve certain Pokemon, but their availability varies between Pokemon games.

If you're playing Pokemon Crystal, you can still evolve certain Electric-type Pokemon, but you'll need to use other methods:

* Pikachu: Pikachu evolves into Raichu by leveling up while holding a Thunder Stone.

* Elekid: Elekid evolves into Electabuzz by leveling up.

* Magby: Magby evolves into Magmar by leveling up.

Let me know if you have any other questions about Pokemon Crystal!