Pokémon Brilliant Diamond and Shining Pearl: Full Nature chart and guide
Introduced in the third generation of games, Pokémon Natures helped add an additional value to give your Pokémon defining characteristics, more of a personality, and even a competitive edge in battle.
Natures are a randomized aspect of every Pokémon that has been generated since the feature was added in Ruby and Sapphire. They determine how a Pokémon’s stats grow, typically giving more emphasis to one of the five, non-HP statistical values, while taking away the emphasis on another.