Nature

Natures are the Pokémon analogue of personalities. They either increase a stat by 10% and decrease a stat by 10%, or not affect its stats at all. Note, however, that Natures do not affect experience or DVs. Natures exist only in the Generation III and Generation IV games, and Pokémon can currently have one of over 25 Natures.

Nature	Increased stat	Decreased stat	Favorite flavor	Flavor Dislikes	Generation
Adamant	Attack	Sp. Attack	Spicy	Dry	III
Brave	Attack	Speed	Spicy	Sweet	III
Bashful	None				III
Bold	Defense	Attack	Sour	Spicy	III
Calm	Sp. Defense	Attack	Bitter	Spicy	III
Careful	Sp. Defense	Sp. Attack	Bitter	Dry	III
Docile	None				III
Gentle	Sp. Defense	Defense	Bitter	Sour	III
Frivolous	???				IV
Hardy	None				III
Hasty	Speed	Defense	Sweet	Sour	III
Impish	Defense	Sp. Attack	Sour	Dry	III
Jolly	Speed	Sp. Attack	Sweet	Dry	III
Lax	Defense	Sp. Defense	Sour	Bitter	III
Lonely	Attack	Defense	Spicy	Sour	III
Meticolous	???				IV
Mild	Sp. Attack	Defense	Dry	Sour	III
Modest	Sp. Attack	Attack	Dry	Spicy	III
Naive	Speed	Sp. Defense	Sweet	Bitter	III
Naughty	Attack	Sp. Defense	Spicy	Bitter	III
Quiet	Sp. Attack	Speed	Dry	Sweet	III
Quirky	None				III
Rash	Sp. Attack	Sp. Defense	Dry	Bitter	III
Relaxed	Defense	Speed	Sour	Sweet	III
Sassy	Sp. Defense	Speed	Bitter	Sweet	III
Serious	None				III
Timid	Speed	Attack	Sweet	Spicy	III