The same Pokemon you find in Diamond and Pearl. Tentacruel, Magikarp, Golduck, Psyduck, Seaking, Goldeen, Seel, Dewdong, and rarely for me Gyarados. But their are much more than just that. Thanks for letting me answer your question!
in the water by were you can find shaymin
you can find it while mining underground.
buy the Pokemon platinum book
The 151st Pokemon is Mew and is unobtainable in Pokemon Platinum.
no you can't find a torchic egg in Pokemon platinum
try your best to find spirtomb in Pokemon platinum
There is not a route 233 on Pokemon platinum.
You cannot find zekrom in pokemon platinum
you find them in the cave
there is no such Pokemon
You can't find vaporeon but you can get an eevee in Hearthome City and evolve it with a water stone
Magikarp and to find it use the old rod on water.