Actually there is no Pokemon fully unaffected to fire types but there are some that are resistant like water, ground, and rock
just examples
Rock, Ground and Steel types.
There is a constant sandstorm on route 228 on Pokemon Diamond. It is not possible to ever remove this sandstorm.
No, it does not.
Regirock
no
No
You need to get the go-go goggles.
The Root fossil is the Pokemon Lileep and the Claw fossil is anorith =D
Steel. These Pokemon include: Empoleon, Steelix, Mawile, etc.
If you evolve it to gliscor, yes, especially for sandstorm and stall teams.
Dark-type pokemon are resistant to Dark and Ghost moves, and are unaffected by Psychic.
Catch after the National Dex on the route with the sandstorm or evolve Hippopotas
If you are talking about pokemon, if blizzards accuracy is 100, then no.