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. (:
The best way to trade i guess wuld be to 'MIGRATE' from LeafGreen, in Pal Park to do this you need to beat the elite four and get the national pokedex
yes but first you need to get the national pokedex from oak after beating the elite four.
YOU NEED TO FIGHT ALL POKEMON AND YOU WILL COMPLETE THE POKEDEX. AND THAT WILL HELP YOU TO GET THE NATIONAL POKEDEX BY TALKIN TO PROFESSOR OAK.
you need to trade bellsprout, vulpix, and sanshrew from leafgreen and you can get the rest in fire red.
No
You need to for the National Pokedex, but not the Sinnoh Pokedex.
Yes, I'm pretty sure, but you will need to gameboys and a connector cord
In Pokemon Diamond and Pearl you need the National Pokedex to get Magnemite. In Pokemon Platinum you don't need the National Pokedex to get Magnemite.
you need the national pokedex to get eevee
You do need the national pokedex for the Pokemon modifier. the Pokemon modifier uses the national pokedex numbes. you can not use the sinno pokedex.
Yes you need the national pokedex! And to obtain the national pokedex you need to defeat the elite four.
You will need to catch at least 60 different Pokemon and defeating the Elite Four, then talk to Prof. Oak in Pallet Town.