Nature

Natures are the Pokémon analogue of personalities. They were introduced by the Generation III games and remain a game mechanic in Generation IV. Each Pokémon in these games has one of 25 natures, as listed and described in the table below. A Pokémon's nature usually affects the growth rate of two of its stats, ultimately increasing one of its stats by 10% and decreasing another of its stats by 10%. Five of the possible natures, however, have no effect on the Pokémon's stat growth. (Note that despite these relationships to a Pokémon's development, natures do not affect experience or DVs.) Natures also determine the Pokémon's favorite flavor of food and which flavor it dislikes. The exception is again the five previously mentioned "neutral" natures, which cause a Pokémon to not like or dislike any flavor. From Emerald onwards, a Ditto or a female Pokémon that holds an Everstone has a 50% chance of passing its nature to its offspring when at the Pokémon daycare. Natures also depend on the way the Pokémon battle by themselves at the Battle Palace, different natures make the Pokémon use different methods of attacks and change tactics when they're low on health. Also, the five non-increasing/decreasing natures have different battle styles at the Battle Palace.

The following table lists each nature and its effect on a Pokémon; it may be rearranged by clicking the boxes next to each column's heading.