You can get a few of moon stones:
1. Inside the Mt. Moon (go around looking for items in pokeballs),
1. Inside the Mt. Moon (at the end you can get a fossil after you beat a nerd, just below there is a recess, walk into it and click action buttom)*I accidently found out about it ;P*,
3. In the Rocket Hideout (just walk around looking for items in pokeballs),
4. In the Cinnibar Mansion (just enter it and go up, until you see a group of stones on the left, click on them and you will find moon stone in one of them),
5. On Two Island, after you save Collette (or something, I don't remember her name now, but I know she was game corner owner's kid ;P),
6. Additionally you can catch a Clefairy, however a chance of holding moon stone by it is pathetic low (I think around 5 %, but I don't remember now).
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Pokemon requiring a stone to evolve:Eevee - Thunder stone, Jolteon (you can't find this Pokemon in Ruby) Eevee- fire stone, Flareon (you can't find this Pokemon in Ruby)Eevee- water stone, Vaporeon (you can't find this Pokemon in Ruby)Sunkern- sun stone, Sunflora (you can't find this Pokemon in Ruby)Jigglypuff- moon stone, WigglytuffSkitty - moon stone, DelcattyNidorino- moon stone, Nidoking (you can't find this Pokemon in Ruby)Nidorina- moon stone, Nidoqueen (you can't find this Pokemon in Ruby)Growlithe- fire stone, Arcanine (you can't find this Pokemon in Ruby)Gloom- sun stone, BellosumGloom- leaf stone, VileplumeStaryu- water stone, StarmiePikachu- thunder stone, RaichuLombre- water stone, LudicoloNuzleaf- leaf stone, ShiftryVulpix- fire stone, NinetalesHappiny- oval stone Chansey
Moon stone, Leaf stone, Water stone, Fire stone, Dawn stone, Shiny stone, Dusk stone.
Leaf Stone: Exeggcute, Gloom, Weepinbel Water Stone: Staryu, Eevee, Poliwhirl Fire Stone: Vulpix, Growlithe, Eevee Moon Stone: Clefairy, Jigglypuff, Nidorina, Nidorino I'm about 90 % sure that this is all of them.
There is no moon stone in POkemon raptor or pokemon raptor ex
well you evolve nidoran into nidorino, nidorina and then use a moon stone