Pokémon Natures
Guide by Gizoid/BassNatures, introduced in Generation 3, are values which affect the Pokémon's growth of stats as they level up, and their overall stat range. Natures raise one stat and reduce another. Stats boosted are boosted 10%; likewise, stats lowered are reduced by 10%. The only stat never affected by natures is HP.
For example, say we have three Pokémon, all at level 100. They are the same species, and have the same IVs and EVs - the only difference are their natures. One of them has a Docile nature (does not raise or lower any stat), one of them has a Modest nature (raises Special Attack, lowers Attack), and the third has an Adamant nature (raises Attack, lowers Special Attack). If the Pokémon with the Docile nature has an Attack stat of 300, then the Adamant one would have an Attack stat of 330, and the Modest one would have an Attack stat of 270.
There is a nature for every possible combination of increases and decreases of stats (excluding HP). Using this mechanism, trainers can toy with the Pokémon to get exactly what nature they want. For example, a good nature for a Porygon-Z would be Modest, as Porygon-Z has massive Special Attack and has no need for physical attacks.
Additionally, for those interested in contests, natures also affect what kind of food the Pokémon like and dislike. Each stat is matched with a flavor, which in turn is matched with a contest type:
| Stat | Flavor | Contest |
| Attack | Spicy | Cool |
| Defense | Sour | Tough |
| Sp. Attack | Dry | Beauty |
| Sp. Def | Bitter | Smart |
| Speed | Sweet | Cute |
For example: Adamant raises Attack, but lowers Special Attack. It likes spicy food, dislikes dry food, and therefore, if used in a contest, would best be suited for a Cool contest. (So don't throw away that Adamant Plusle just yet.)
(Additionally, for Emerald players, the natures also affect how the Pokémon performs in the Battle Palace.)
There are 25 possible natures, arranged by what stats they affect.
Stat Changing Natures
| Nature | Attack | Defense | Sp. Attack | Sp. Defense | Speed |
| Lonely | + | | |||
| Adamant | + | | |||
| Naughty | + | - | |||
| Brave | + | - | |||
| Bold | | + | |||
| Impish | + | - | |||
| Lax | + | - | |||
| Relaxed | + | - | |||
| Modest | | + | |||
| Mild | - | + | |||
| Rash | + | - | |||
| Quiet | + | - | |||
| Calm | | + | |||
| Gentle | - | + | |||
| Careful | - | + | |||
| Sassy | + | - | |||
| Timid | | + | |||
| Hasty | - | + | |||
| Jolly | - | + | |||
| Naive | - | + |
Neutral Natures
| Docile | Serious | Hardy | Quirky | Bashful |
These natures do not effect the Pokémons stats at all.





