In fire red and leaf green there are
(areodactyl amber, dome fossil kabuto, spiral fossil omanyte)
emerald sapphire and ruby
(root fossil lileep, claw fossil anorith)
in Diamond pearl and platinum
(skull fossil cranidos (only in platinum and diamond), sheild fossil sheildon(only in pearl and platinum. Then the rest of the fossils listed up there are also in diamond pearl and platinum after the elite four
(areodactyl amber, dome fossil kabuto, spiral fossil omanyte)
emerald sapphire and ruby
(root fossil lileep, claw fossil anorith)
in Diamond pearl and platinum
(skull fossil cranidos (only in platinum and diamond), sheild fossil sheildon(only in pearl and platinum. Then the rest of the fossils listed up there are also in diamond pearl and platinum after the elite four