To get a Clefairy onto your Pokemon Ruby game, you'll need to trade one from Fire Red or Leaf Green.
You have to trade a Clefairy from Leaf Green or Fire Red.
No Pokemon is 'on the moon', simply because you can't go there. Pokemon that come from the moon are;Cleffa, Clefairy, and Clefable.(Cleffa cannot be obtained in Ruby)
no
Mt. Cornet.
I assume you mean Clefairy. Clefairy can be found uncommonly at Mt. Coronet.
Pokemon ruby's version IS Pokemon ruby.
You find it in mt.moon. Hope I helped
They can always be found underground but, there very rare also Clefairy sometimes hold them in the wild.
Well if you can't find it in the grass try trading with somebody or migrating it but there is probably no other way you can find clefairy in heartgold.
You can find clefairy in mt.moon, but it is very rare.
You cant get Clefairy. But you can trade with someone who has clefairy.
You have to evolve your clefairy using a moon stone. If you don't have a clefairy you can find them in Mt. Moon on the first floor.