Question

Where do you find a Moon Stone and a Shiny Stone in HeartGold and SoulSilver?

Answer 1

Moon Stone

Non-repeatable
- Tohjo Falls (Western ledge behind waterfalls)
- Ruins of Alph (Hidden room in lower right entrance 2)
- Player's mom (Once an unknown amount of money has been saved)

Repeatable
- Mt. Moon Square (Mondays at night)
- Bug-Catching Contest (post-National Dex, first place)
- Pokeathlon Dome (3000 points, Monday/Wednesday)
- Pickup (starting at Level 41)
- Wild Clefairy, Clefable, Lunatone (5%)

Shiny Stone

Non-repeatable
- National Park (Northeast cliff behind the fence)

Repeatable
- Route 14 (Gift from Bird Keeper Josh if player has his phone number)
- Bug-Catching Contest (post-National Dex, first place)
- Pokeathlon Dome (3000 points, Sunday/Monday/Wednesday/Thursday/Saturday)

Answer 2

All can be bought by points from the Pokeathlon, in the Pokeathlon shop.

Answer 3

Well you can't go underground in SS.
Although like charizard said all of them can be bought from the pokeathon's shop.