ALL
You have see to many different pokemons. Then you will fill it (you have to every Pokemon to get national pokedex).
you need 200 Pokemon to fill the whole pokedex
you don't need to catch them just see all the Pokemon in the hoenn pokedex
All that you want, because you only need to defeat elite four to get nationaal pokedex.
you can check the pokedex, it is in fiery path.... and many caves! Just check the pokedex, it's quicker.
all 210 in platinum but you only have to see them
when u fill the boxes int he computer
Each game features 135 new Pokémon species, and pre-recorded data for each of them, plus the 251 Pokémon of previous generations. Also, you don't need to catch all of the Pokemon to fill your Pokedex, all you need to do is see them. Here's a website that shows you where to find each Pokemon in Sapphire, Ruby, and Emerald : Lloyd.truepath.com
There are 493 Pokemon in the current National Pokedex.
Beat the Elite Four and catch more than 60 Pokemon. The Pokedex shows how many Pokemon you caught.
The answer is 0.You need to see every Pokemon to get to the volcano
all of them in the regional pokedex