well after you beat the game you unlock this dig site called coldfeet glacier and that is where you find spino.
in the secret site.
in the pay-to-dig site
You can find a pachrino fossil in the pay to dig site at rivet ravine. Go to the mine car on your left and take it. That will lead you to the site.
Find him at the pay-to-dig site in the Greenhorn plains
you can find carchar in greenhorn plains in the pay to dig site
You get it in Rivet Ravine Tunnel #1 Pay-To-Dig Site!
ANy random dig site just be lucky
you find him in the pay to dig site in rivet ravine when you take the mine car on the left of the tunnel
In "Fossil Fighters," you can find Hoplo fossils in the rivers and swamps of the Dino Valley area. Look for specific fossil sites that are indicated by the presence of water. Once you locate a site, use your digging tools to carefully excavate the fossils. After collecting enough pieces, you can assemble Hoplo in the Fossil Center.
in dig site 1 forest
From what I know on the site, it says you can find him at Mt. Krakanak. Check the related link below.
It's in the moles secret tunnel,you'll find it in rivet ravine in the mines.