Try checking http://www.psypokes.com/dex/index.php
It has a complete pokedex, which covers all 4 generations of the "regular" Pokemon games.
Yes but it does not involve the special features that are offered by the platinum version
For most routes, the pokemon be the same. But a couple of routes will be different compared to diamond/pearl.
There is a map in the Pokemon Diamond/Pearl Guide Book.
no
You have to dig it out under ground and you only get it in Pokemon pearl.
Yes, Pokemon Diamond and Pearl's region name is Sinnoh Region.
on pearl, its palkia and on diamond, it's dialga
get the Pokemon platinum guide book
diamond- skull fossil- cranidos-rampardos pearl-armor fossil- sheldon-bastiodon
check your national pokedex check serebii.net :)
no soz unforturnotley
Look in a walkthrough guide. It WILL show you.