just use the Pokemon global trading system. if you have platinum pearl or diamond it is in jubelife city. and if you have heartgold or soulsilver it will be in goldenrod city.
Yes you can. You just have to fill up your pokedex and talk to pr.Rowan.
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.
fill in your pokedex
your rival has it
Nothing. It just gives a great feeling that you did something.
what you do is go round and battle lots of different people and your pokedex will soon fill up that's what i did to fill up my and now i have completed the game.
you have to fill up your pokedex
fill up your pokedex
Yes you can. You just have to fill up your pokedex and talk to pr.Rowan.
fill up sinnoh pokedex to national pokedex.
Without an Action Replay, there is no easy way to fill the National Pokedex.
You become an uber nerd;)
Fill up the rest of your Pokedex!
Try to fill up the Pokedex.
A diploma, gold trainer card and a congratulations.
To research Pokemon, and fill up their Pokedex.
Just catch the most Pokemon you can ;)