Well, You must :
-Beat the Elite 4 and the Champion once
-At least catch 60 Pokemons in the Pokedex
-Finish Bill's quest in Sevii Islands
After that, go talk to Professor Oak at his Laboratory.
He will give you the National Pokedex, and your rival will come angrily
because the professor trust you more than him.
After getting the National Pokedex, you will be able to:
-Catch Level 70 Mewtwo at Cerulean Cave
-Ecounter one of the Legendary dogs
-Get a new quest from Celio (Bill's friend) and make a journey to Island 4-7
Happy Playing!
Source : My Experience of playing the game
Psypokes.com
You have to trade with firered or leafgreen to get the national pokedex.
Yes, but you must have the national pokedex
Provided you have the national Pokedex. Yes.
You need the national pokedex 1st....
get firered or leafgreen and migrate it to pearl after national pokedex
Yes, but only after you get the national pokedex.
explore 7 island . GL !! ^^
A national pokedex is usually gained late game, the national pokedex is an upgraded pokedex which records information about Pokemon around the nation, including Pokemon from previous generations, a national pokedex also allows Pokemon to evolve into forms which have been discovered in different games or generations i.e (in Pokemon Firered and Leafgreen, it is only possible to evolve golbat into crobat after acquisition of the national pokedex).
After you fill your whole dex and beat the E4.
Cleffa is No. 173 and Igglybuff is No. 174.
The original Pokedex is given to the player by Professor Birch. After the Pokemon Ruby trades with LeafGreen or FireRed the National Pokedex will be unlocked.
If i am right you have complete your kanto(???) pokedex. I don't know if it is kanto or national.