oreburgh city museum.
No
No
if you want to know, the Pokemon it has are 1. a googa googa
The only one I can think of is mew because you can't get him without using a cheat.
to get deoxys to change to a different form, go to veilstone city and click on one of the meteorites.
The Fossils in Pokémon Diamond are the Helix Fossil which is the Omanyte Fossil, the Dome Fossil which is the Kabuto Fossil, the Old Amber which is the Aerodactyl Fossil, the Root Fossil which is the Lileep Fossil, the Claw Fossil which is the Anorith Fossil, the Skull Fossil which is the Cranidos Fossil and the Armor Fossil which is the Shieldon Fossil.
You get the fossil in pearl and trade it to diamond
No
Its a sheildon fossil
walk left of verdanturf town until you see the fossil maniach's house, go in and talk to the little kid, if he doesn't give it to you go to the tunnel in the back of the room and talk to the fossil guy
skull fossil and amour fossil
The skull fossil is exclusive to diamond, so get a friend with pkmn diamond to ressurect the fossil and trade you a cranidos. As far as I know, this is the only way.