It is in Rivet Ravine. I believe it is rare because I have the head fossil and it is rare. :)
Root Fossil Claw Fossil Helix Fossil Dome Fossil Old Amber Armor Fossil Skull Fossil Rare Bone
daspelto is rare but you should find him in the bb base with a fully upgraded sonar.
in mount lavaflow very rare
Its not hard but very rare to find a fossil..when your digging for minerals there is a 30% chance that you may dig up a fossil like a cranidos,sheldon,omanyte,kabuto,lileep,anorith and aerodactyl.
Yes the fossil is the skull fossil.
there are 3 ways, you can either dig for him in Parchment Desert, one of the two places you can get from finishing the main story line, buy him in the shop, or get a friend to trade him to you. finding him at the store is the hardest and getting him from a friend the easiest, it's a rare fossil so don't get your hopes up, but like most fossils, once you find it it's every-where!
yes relicanth is rare because it is a living fossil Pokemon
He is purple, has Golding lines like warriors, and he has a long neck. You can find him in the secret tunnel and he is pretty rare but tricera is not rare, he is VERY common
They're rare, so you just have to find one by chance.
Old Amber is a random, rare find in the Underground. It's not actually found in any specific spot, like you seem to think. It can be found anywhere, it's just rather rare. :)
because gold is so rare and hard to find as to where tin is sc easy ti find,and its so rare.