You can complete the pokedex on Pokemon Blue version by trading with you friend who has Pokemon Red version. Or you could do what I do and get two gameboy color's and multiple Pokemon games because none of my friends play Pokemon anyomore; even though it is one of the best games of all time =).
Last time I checked, only in Emerald did you have to capture every Pokemon for the PokeDex to be complete.
you find all the Pokemon
you have to beat the Pokemon champion and later on in the game you will complete it
you see all the Pokemon in platinum and trade from your other games like emerald, blue, fire red etc and that is how you find all Pokemon in platinum.
You have to travel around Sinnoh to complete the Pokedex.
You have to catch 151 pokemon to complete the pokedex.
you need to find 210 Pokemon to complete the pokedex
you have to complete the first pokedex
There is only one legitimate way to complete the Sinnoh Pokedex. To complete the Sinnoh Pokedex you must trade for the missing Pokemon with Pokemon Diamond, Pearl or Platinum.
For a player to complete the Pokedex in the first generation games Red and Blue, they must catch all 150 official Pokemon from the first generation. After this, they receive an in-game certificate and congratulations from Professor Oak.
Complete the Pokedex
first it is the pokedex and look on pokemon.com they have a pokedex page
First complete the sinnoh pokedex, 210 Pokemon
Last time I checked, only in Emerald did you have to capture every Pokemon for the PokeDex to be complete.
You have to complete the Sinnoh pokedex before haveing the national pokedex.
you find all the Pokemon
you have to beat the Pokemon champion and later on in the game you will complete it