Where is the Moon Stone in Pokemon Red?

Question

I am training a nidoran(boy)

Answer 1

Non-repeatable
- Route 2 (South of the eastern gate; requires Cut)
- Mt. Moon (1F; northwest area of floor)
- Mt. Moon (B2F; hidden item southeast of the Super Nerd)
- Rocket Hideout (B2F; northwest of tile maze)
- Pokemon Mansion (1F; hidden item on fifth pillar northeast of entrance)

Moon Stone (Bulbapedia)

Answer 2

You can find one at Mt. Moon, the Rocket Hideout and on Route 2.