The claw fossle is better... BUT after you beat the elite four, go into the house in route 114 the fossil maniac's house and go ito the cave he busted open. at the end of the cave there is the opposite fossil of wich you got in the desert. there is also lots of dittos in there!!!
there are different Pokemon in it
it is in the top right of the desert. you can choose between it and the claw fossil
u simply take it to a sientist in mr.stones building
I don't think you can, in emerald you need the nationaldex and POW! it's open but in ruby and sapphire you can't.
As soon as you give it leave the whole building go back inside talk to the guy who took the fossil to receive your very own Lileep(root fossil) or Anorith(claw fossil).
The Claw fossil
== ==
No, not all fossils can be found in Omega Ruby or Alpha Sapphire however the fossils that can be found would include the Dome Fossil also known as the Kabuto fossil, Plume Fossil which is the Archen fossil and Armor Fossil which is also the Shieldon fossil can be found in Omega Ruby, the Skull Fossil also known as the Cranidos fossil and Cover Fossil (also known as the Tirtouga fossil) can be found in Alpha Sapphire while the Old Amber Fossil which is the Aerodactyl fossil can be found in both Omega Ruby and Alpha Sapphire.
IT is in the mountain where you fight a guy and you get to choose which fossil to get
there are different Pokemon in it
Anorith and Lileep.
In the dessert
It is lileep.
you can revive it to get an anorith. the root fossil will give you lileep.
in the desert wear your go goggles
it is in the top right of the desert. you can choose between it and the claw fossil
The dome fossil is only in firered and leafgreen, you can get the claw fossil or some other fossil, the claw fossil is anorith the other one is lileep.