Number 209 is Snubbull and 210 is Granbull, its evolution form. Snubull can be found in Route 209 in a Swarm in Pokemon Diamond, Pearl, and Platinum. For Granbull, it can be obtained by evolving Snubull. For the Generation III games, they have to be traded from Pokemon Emerald. (Pokemon Emerald's location is in the Safari Zone Expansion)
Chansey is available before the National Dex in Platinum. She can be found on Route 209 and Route 210 South.
There are 210 in the Sinnoh Dex, 493 in the National Dex {including EVENT Pokemon}
The sinnoh dex has 210 pokemon, and the national dex has 493 pokemon. It has an entire 664 pokemon (I think)
There are 210 in the sinnoh dex and 490 in the national dex
Giratina is number 210 in the Sinnoh Pokédex, and Granbull is number 210 in the National Pokédex.
You have to get all 210 Pokemon in the sinnoh dex. Then go to Rowan's office and professor Oak will come in and give you the national dex.
In Pokemon Platinum to get the National Dex you will need to have seen all 210 Pokemon in the Sinnoh Dex then talk to Professor Rowan and then after a while Professor Oak will give you the National Dex!
It depends. Before National Dex: 210 After National Dex: 493 With Glitch Pokemon: about 500
sinnoh dex has 210 Pokemon. national dex has 493 Pokemon
I'm 95% sure you have to see all 210 Pokemon in your Pokédex. How do I know? Because I'm currently in your position, and have 209. ;S
See all 210 of the sinnih dex and talk to oak
route 210 north and you need the national dex by the way they are rare