There is a way for players to collect every Gen 1 through Gen 4 starter in Pokémon Brilliant Diamond & Shining Pearl. Players will begin their adventures through the Sinnoh region in Pokémon BDSP with either a Piplup, Turtwig, or Chimchar.
This Pokémon will grow to become a loyal and powerful ally to the player. With every new Pokémon journey, starter Pokémon are amongst the rarest creatures, and, for the most part, players will need to trade with others to obtain them all.
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