natures

Each + means a 10% boost, each - means a 10% drop

+ Attack

Adamant = + Atk - SpA
Brave = + Atk - Spe
Lonely = + Atk - Def
Naughty = + Atk - SpDef

+ Special Attack

Modest = + SpA - Atk
Mild = + SpA - Def
Rash = + SpA - SpDef
Quiet = +SpA - Spe

+ Speed

Jolly = + Spe - SpA
Timid = + Spe - Atk
Naive = + Spe - SpDef
Hasty = + Spe - Def

+ Defense

Bold = + Def - Atk
Impish = + Def - SpA
Lax = + Def - SpDef
Relaxed = + Def - Spe

+ Special Defense

Calm = + SpDef - Atk
Careful = + SpDef - SpA
Gentle = + SpDef - Def
Sassy = + SpDef - Spe

Neutral Natures. These offer no boost and no drop in any stat

Bashful
Docile
Hardy
Quirky
Serious