The Dome Fossil can be revived into the pokemon kabuto.
near the end of mount moon the super nerd will challenge you if you win you will choose either the dome fossil or the helix fossil if you lose you will get sent to the Pokemon center at the entrance you can restore it when you get to cinnabar city you can not get the other fossil you choose
Fossils cannot be created in Pokemon FireRed, there is a finite number of them to find.
The Left One
Go to Mt. Moon and go until you fight this scientist person and then you will be able to get the dome fossil.
The Dome Fossil can be revived into the pokemon kabuto.
Helix
You Cant
near the end of mount moon the super nerd will challenge you if you win you will choose either the dome fossil or the helix fossil if you lose you will get sent to the Pokemon center at the entrance you can restore it when you get to cinnabar city you can not get the other fossil you choose
Fossils cannot be created in Pokemon FireRed, there is a finite number of them to find.
The Left One
If taken to cinnbar island's research lab you can revive the Pokemon inside the fossil which will be Kabuto.
Take it to the museum in cinnabar city to have it revived
cinnabar island research center
The ocean one in the museum.
give the fossil to the museim dude in peweter.(sorry about the bad spelling :)
Restore it by fossil when you break rocks in the Glittering Cave