If you're talking about one of the two fossils you find in Mt. Moon, you take it to Cinnabar Island and go to the building next to the Pokecenter, and take it to the scientists in the back room and talk to them and they'll ask you about the fossil. You give it to them, walk outside, and make sure you have an open spot in your team, go back and you'll have your clone. Also, there is another fossil in the museum in Pewter City. But, you'll need to know Cut and go through the back of the museum. There is a gold thing on a podium. It's called the Amber Fossil. If you take it to the scientists and leave and come back you'll get an Aeordactyl.
you can't, sorry, you can only clone on emerald.
you cant clone Pokemon on sapphire ------ Or Blue. =D
It can be used to clone a pokemon.
Cloning is not possible in generation I games.
no you can not clone a shiny Pokemon
yes
YOUR POKEMON DON'T BE SHINNY WHEN YOU CLONE.
yes.you can clone any Pokemon
You can't clone in ruby.
the same way clone a Pokemon with a sex
don't try to clone any Pokemon i tried to clone scitty and lost all of my Pokemon i lost 298
Sry to say it but you can't. You can only clone Pokemon in Emerald.