Instructions
Head to Johto National Park on Tuesday, Thursday or Saturday. Take first place in the bug-catching contest to earn a Moon Stone.
Visit Tohjo Falls and explore the far western ledge. Sneak behind the waterfalls to discover this Moon Stone.
Check in with your mom periodically throughout the game. Once you have accrued enough savings, she will give you a Moon Stone.
Head to Mt. Moon Square at 8:00 p.m. on Monday night. You̵7;ll see two Pokémon dancing around a rock. Smash this rock to find a Moon Stone.
Check out the Athlete Shop at the Pokéathlon Dome on Mondays. You can buy a Moon Stone for 3,000 points on Mondays.
Obtain the National Pokédex and use your Pokéwalker accessory on Volcano Path and Night Sky̵7;s Edge. Both Pokéwalker paths have a small chance of awarding you a Moon Stone.