There is no such area. You have to trade to get Pokémon that is unavailable in Pokémon Platinum.
Catch all the pokemon in the region. Get the national pokedex
buy the Pokemon platinum book
Normal Pokemon that appear in that area.
There is no cheat for catching all the Pokemon on Pokemon platinum. it's all down to hard work and persistence.
The national pokedex will have ...............................a lot of Pokemon u will have to go to mainly resort area and survival area i hope i helped you
no
You must see all 210 pokemon in sinnoh and get the national pokèdex
you can find it in the survival area
you can find it in the safari area
in the fight area
In The Resort Area
The Resort Area