no you can not complete your nat. dex at the battle tower. you can't complete it with wi-fi battles either.
The answer is 0.You need to see every Pokemon to get to the volcano
Fill up your Sinnoh pokedex. Here's something that will help you: Rotom.
you have to see all of the Pokemon and then you get the national pokedex from Prof. Birch and Prof. Oak in Prof. Birch's lab after completeing the Sinnoh pokedex.
after you get it you can get palkia dialga heatran the legendary birds (after talking to oak @ palpark) event Pokemon and more. you can also travel the routes of the resort survival and battle zones. this for platinum. for p/d take out the 3 birds and palkia and dialga.
You only need to see them but you have to catch at least 60 Pokemon to get the national dex
no they don't add Pokemon into your pokedex there
You have to battle every single trainer if not true improve answer
To rebuild the Burnt Tower in Pokemon HeartGold and SoulSilver, you must fill up your pokedex. By the time that you finish your national pokedex, the Burnt Tower should be restored to its previous state. However, I am not sure what you can do in it when it is rebuilt.
you get your legendery pokedex!!!! you get your legendery pokedex!!!! you get your legendery pokedex!!!!
You've beaten the game. I guess just fill up your pokedex and truly check them all.
try and fill the national dex
There is no ar cheat known to fill the national pokedex.
You have see to many different pokemons. Then you will fill it (you have to every Pokemon to get national pokedex).
The answer is 0.You need to see every Pokemon to get to the volcano
fill up sinnoh pokedex to national pokedex.
Yes you can. You just have to fill up your pokedex and talk to pr.Rowan.
use action replay