Go to rustboro city and go inside the Devon corporation and head upstairs until you find lots of scientists talk to the ones on the bottom and one will say i will regennerate fossils, allow the scientist to do so leave then come back and you will receive your ancient Pokemon either lileep or anorith.
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.
u talk 2 a boy in the first house you see right past fallabor
You can not catch Lileep in Sapphire or Ruby. You find two fossils in the Desert and one of them is Lileep. To make the fossil Lileep, go to RustBoro city and go the Devon Cooporation. On the second floor, there is a scientist at the bottom who will turn fossils into Pokemon.
you get a fossil on make it come back to live
Your ruby game may be corrupted somehow or you forgot to beat the game in ruby, try beating the game in ruby and make sure the game is saved in a Pokemon center before you trade with Pokemon xd.
The Claw fossil
Anorith and Lileep.
In the dessert
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
in mt moon
it is in the top right of the desert. you can choose between it and the claw fossil
you can revive it to get an anorith. the root fossil will give you lileep.
You can get ditto in Pokemon ruby by beating the Pokemon league then going to the cave the fossil maniac is digging he will be finished digging and he will say to be careful that there are Pokemon in there the Pokemon in there are ditto.
it is right side
in the claw fossil there is a Pokemon called anorith. at level 41 it evolves into armaldo. it is a water/ground type. i know, it doesn't really make much sense... but it is very powerful..... look it up and you will see a picture of it.
Lilleep comes from it, which evolves into a Cradily. The other fossil has an Anorith, which evolves into an Armaldo. Good luck, Trainer!