you cannot evolve it, but you can change its form by going in different weather in the game.
Pidgey don't evolve using a stone, they evolve by level.
Castform so far doesn't evolve however it can change forms during certain weather conditions in a battle those conditions are sun, rain and hail.
A fire stone is used on certain Pokemon to make them evolve. The Pokemon that evolve with a fire stone are: ~Evee ~Vulpix ~Growlithe
The Dawn Stone is a rare item the player can find and use to evolve certain Pokemon. If used on a male Kirlia it will evolve into Gallade. If used on a female Snorunt it will evolve into a Froslass.
There are a whole bunch. I'm pretty sure i won't be covering all of them, but anyways here are the ones i know of off the top of my head: 1: A leaf stone can be used on Gloom to evolve it into a Vileplume. 2: A leaf stone can be used on Weepinbell to evolve it into a Victorybell. 3: A leaf stone can be used on Paras to evolve it into a Parasect. 4: A leaf stone can be used on Exeggcute to evolve it into a Exeggutor. And just to get this clear, Evee does not evolve into a leafeon with a leaf stone.
A Dawn Stone is used to evolve a male Kirlia into a Gallade and a female Snorunt into a Froslass.
It won't evolve until you've used a Leaf Stone on it.
the shiny stone is used to evolve Togetic and Roselia.
It's used to evolve a togetic.
No, it evolves by levelling only, Lv20 to be precise.
The Oval Stone is an item in the Pokemon games which can be used to evolve certain Pokemon. For example, it can evolve Chansey.
Pokemon dusk stone can be used to evolve certain dark type Pokemon. Murkrow will evolve into Honchkrow when give a dusk stone to hold.