yes up to 493 when you complete the sinnoh dex the rest will be: bulbasaur ivysaur venusaur charmander charmeleon charizard squirtle wartortle blastoise and etc............
See all 150 Pokemon in the Sinnoh Dex and talk to Professor Rowan.
No all you have to do is SEE the first 150 Pokemon then you shall get the national dex..
the Pokemon is rotom to get him you need to trade it over from diamond pearl or platinum
You can't find tangela in diamond or pearl you have to transfer it over through Pal park
It's Manaphy, you can get it with Pokemon ranger. Do the special Manaphy mission and send over the Manaphy egg to pearl or diamond.
150
in the grate marsh
there are exactly 493 pokemon, i know!
you have to see 150 Pokemon then talk to professor oak..
for diamond and pearl there are 150 Pokemon u need to see . in plat nium u neeed to see 210 Pokemon.
There are only a couple of Pokemon that can be traded over to diamond, none of the other Pokemon can be traded over.
See all 150 Sinnoh Pokemon
You have to migrate from GBA to NDS. How about trying the site I've just provided?
You can get the National Pokedex in Diamond when you see all 150 Pokemon, but not necessarily capture them.
See all 150 Pokemon in the Sinnoh Dex and talk to Professor Rowan.
You have to see all 150 Pokemon, you don't have to catch them. After that go to Professor Rowan
150 (and Manaphy, but you don't need to see or get it) in the Sinnoh Dex, and 493 in the National Dex. There should be 151 Pokemon in Pokemon Diamond.