Re: Simple Questions / Simple Answers (Gen 5)
You can get one post game
Actually, this is incorrect. The evolution stone available on Thursdays at the Pokeathlon Dome is the Thunderstone. I should know, I waited to get one to evolve an Eevee. xP Also, I'm afraid the Shiny Stone isn't available there at all. The only stones you can get there are the Moon Stone, Fire Stone, Thunderstone, Leaf Stone, and Water Stone.
You can get one post game