Natures are a mechanic that influences how a Pokémon's stats grow. A Pokémon's Nature is determined when it is generated by the game: when it is obtained as an Egg, when it is encountered in the wild, or when it is given to the player by a non-player character. A Pokémon's Nature usually affects the growth rate of two of its stats, increasing one by 10% and decreasing another by 10%. A Pokémon's Nature and the stats affected by it are displayed on the Pokémon's summary screen: the increased stat is notated in red text and the decreased stat is notated in blue text.
| Nature | Increased stat | Decreased stat | Favorite flavor | Disliked flavor |
|---|---|---|---|---|
| Hardy | - | - | - | - |
| Lonely | Attack | Defense | Spicy | Sour |
| Brave | Attack | Speed | Spicy | Sweet |
| Adamant | Attack | Sp. Attack | Spicy | Dry |
| Naughty | Attack | Sp. Defense | Spicy | Bitter |
| Bold | Defense | Attack | Sour | Spicy |
| Docile | - | - | - | - |
| Relaxed | Defense | Speed | Sour | Sweet |
| Impish | Defense | Sp. Attack | Sour | Dry |
| Lax | Defense | Sp. Defense | Sour | Bitter |
| Modest | Sp. Attack | Attack | Dry | Spicy |
| Mild | Sp. Attack | Defense | Dry | Sour |
| Serious | - | - | - | - |
| Quiet | Sp. Attack | Speed | Dry | Sweet |
| Rash | Sp. Attack | Sp. Defense | Dry | Bitter |
| Calm | Sp. Defense | Attack | Bitter | Spicy |
| Gentle | Sp. Defense | Defense | Bitter | Sour |
| Sassy | Sp. Defense | Speed | Bitter | Sweet |
| Bashful | - | - | - | - |
| Careful | Sp. Defense | Sp. Attack | Bitter | Dry |
| Timid | Speed | Attack | Sweet | Spicy |
| Hasty | Speed | Defense | Sweet | Sour |
| Jolly | Speed | Sp. Attack | Sweet | Dry |
| Naive | Speed | Sp. Defense | Sweet | Bitter |
| Quirky | - | - | - | - |