6, there are seven fossil pokemon but you cannot get Cranidos.
fossils are found under ground
in the underground
you can get all the fossils for every game once you have beat the elite four
Oreburgh Town
by digging them from underground
there is no fossils of squrtle in any game
Dig Underground
go to: http://www.anime.com/PokeMon/
you need to be more specific peoples!
only the underground.
Armour,Skull,Helix,Dome,Old Amber and Root Fossils.
Go to the Underground