Use the Explorer kit and go underground to dig into the walls, you will find fossils, spheres, shards and other items
The underground
You can find it underground i only get skull fossils but you get them underground.
yes u can but you might have other fossils until you get the national pokedex
you found them under ground in the walls then dig it up
Yes! Go underground, go to your base, use the "Radar" and search for "TREASURE" and find a spot. Go dig in that area, you get alot of fossils sometimes. -Seth, AKA Legend in Platinum
you go to the mines (any) and if you have a explorer kit the you go in and you use it then you find fossils
after you get the explorer kit go underground and mine the walls where they are shiny then eventually you will find some
you need to find fossils underground. if you have national pokedex you can find aerodectyl's old amber, lileep, kabuto and anorith's fossils. if you have not got the national dex, if your trainer id ends with a odd number, you get skull fossils (cranidos) and if it ends with a even number you get armour fossils (sheildon).
By digging underground, you may find Fossils. If you find a Skull Fossil, go to Oreburgh City and get in reincarnated at the museum.
In the underground.
saltwater
Mainly gold, platinum and coal in the minerals side of "find" In terms of fossils "Mrs Ples"