You must trade with everygame,go in the trainer tower,and finally catch every legendary.
there is no national dex in Pokemon emerald. but, you can trade it from Pokemon leafgreen, and firered.
see every Pokemon
You have to own 60 Pokemon to get the national pokedex.
Pokemon 1-150 national dex 1-386
beat the Pokemon league.
All of them
You get the national dex and the rainbow pass after getting the ruby!
Not including Kanto Pokemon their are 235 pokemon in the National Dex. With Kanto Pokemon included their are 386 pokemon in the entire pokedex.
you cant find it you have to migrate it from Pokemon leafgreen or Pokemon firered.
You have to trade with firered or leafgreen to get the national pokedex.
The only way to get Snubbull on Pokemon LeafGreen is by trading for one from Pokemon Emerald. Snubbull can be found in the Safari Zone extension of Pokemon Emerald which is unlocked by earning the National Pokedex.
The national is the National Pokedex. This pokedex allows you to catch/see new pokemon. You'll also get to go to 4,5,6, and 7 island.