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 affect 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. 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.

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.

#	Nature	Japanese	Increased stat	Decreased stat	Favorite flavor	Disliked flavor
0	Hardy	がんばりや	—	—	—	—
1	Lonely	さみしがり	Attack	Defense	Spicy	Sour
2	Brave	ゆうかん	Attack	Speed	Spicy	Sweet
3	Adamant	いじっぱり	Attack	Sp. Attack	Spicy	Dry
4	Naughty	やんちゃ	Attack	Sp. Defense	Spicy	Bitter
5	Bold	ずぶとい	Defense	Attack	Sour	Spicy
6	Docile	すなお	—	—	—	—
7	Relaxed	のんき	Defense	Speed	Sour	Sweet
8	Impish	わんぱく	Defense	Sp. Attack	Sour	Dry
9	Lax	のうてんき	Defense	Sp. Defense	Sour	Bitter
10	Timid	おくびょう	Speed	Attack	Sweet	Spicy
11	Hasty	せっかち	Speed	Defense	Sweet	Sour
12	Serious	まじめ	—	—	—	—
13	Jolly	ようき	Speed	Sp. Attack	Sweet	Dry
14	Naive	むじゃき	Speed	Sp. Defense	Sweet	Bitter
15	Modest	ひかえめ	Sp. Attack	Attack	Dry	Spicy
16	Mild	おっとり	Sp. Attack	Defense	Dry	Sour
17	Quiet	れいせい	Sp. Attack	Speed	Dry	Sweet
18	Bashful	てれや	—	—	—	—
19	Rash	うっかりや	Sp. Attack	Sp. Defense	Dry	Bitter
20	Calm	おだやか	Sp. Defense	Attack	Bitter	Spicy
21	Gentle	おとなしい	Sp. Defense	Defense	Bitter	Sour
22	Sassy	なまいき	Sp. Defense	Speed	Bitter	Sweet
23	Careful	しんちょう	Sp. Defense	Sp. Attack	Bitter	Dry
24	Quirky	きまぐれ	—	—	—	—