After defeating the Elite Four and battling all of the Gym Leaders in Pokémon Brilliant Diamond and Shining Pearl, the goal for you will likely be to encounter all of the Pokémon in the Sinnoh PokéDex. These are Pokémon you can only encounter during the first part of the game.
However, after you find them all and fill out your Sinnoh PokéDex, you’ll unlock the National PokéDex, giving you access to all of the Pokémon that appeared in previous games, from generations one to three. How many
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