you don't need a national pokedex to trade from ruby to leaf green. You have to get the gems the sapphire and the ruby in order to trade from leaf green to ruby. These are found in leaf green. (:
Latios, Groudon, and Rayquaza are the only legends in ruby. Any other legend you have to trade to Ruby or complete the pokedex and talk to Prof Birch for another pokedex.
beat the hoenn pokedex and go to prof.birch
http://pokemondb.net/pokedex/national
You get the Pokedex after choosing your starter Pokemon in Prof. Birch's lab.
Yes
It is grimer
Tell me!
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.
yes,it is the hoenn pokedex you can get only in ruby,sapphire and emerald.
You have to catch 151 pokemon to complete the pokedex.
To get the National Pokedex, beat the Elite Four.