You can catch it at Mt. Coronet.
no
No.
Clefairy's Egg Group is Fairy, so any Pokemon with the same Egg Group can breed with Clefairy, including Ditto, which has its own Egg Group.
The Pokemon clifairy does not exist. Clefairy is found in mt. coronet.
Sometimes Clefairy can be holding a moon stone with them, so my advice is to go to Mt. Coronet and try your best to catch one.
NO you cant catch syther in Pokemon pearl
You can't catch a charizard in pokemon pearl.
moon stone will help
in caves and mountains, especially mt. coronet
neither of them is better, they are both the same, but in diamond, you catch dialga, and in pearl, you catch palkia, and you can catch different Pokemon in each game for example: you can catch this Pokemon in diamond, but not pearl but: you can catch this different Pokemon in pearl, but not diamond
you can certainly catch Dioxies in the game Pokemon pearl
It's impossible to catch Jiratchi in Pokemon Pearl version.