Serene Grace

Serene Grace doubles the chance of moves' secondary effects occurring - specifically stat changes, status ailments, or flinching. It also increases the chance of flinching due to the held items King's Rock and Razor Fang from 10% to 20% (however, note that those items do not affect moves that already have a flinch chance).

Serene Grace does not affect status moves or the Pokémon's critical hit ratio.

Shadow Ball normally has a 20% chance of lowering Special Defense; with Serene Grace it is boosted to a 40% chance.

Air Slash has a 30% of causing the target to flinch; with Serene Grace it is boosted to a 60% chance. If the item King's Rock is held it does not increase that percentage, but rather if the move does not cause flinching (40% chance), then there is now a further 20% chance the target will flinch from King's Rock. This means Serene Grace with Air Slash and King's Rock gives a total probability of 68% (1 - 0.4*0.8) that the opponent will flinch.

In Generations 3-4 Serene Grace does not increase the flinch chance of King's Rock or Razor Fang.

In Generations 3-5 Serene Grace does not affect the move Secret Power.

Game descriptions

Ruby
Sapphire
FireRed
LeafGreen
Emerald
Promotes added effects.
Diamond
Pearl
Platinum
HeartGold
SoulSilver
Boosts the likelihood of added effects appearing.
Black
White
Black 2
White 2
Boosts the likelihood of added effects appearing.
X
Y
O.Ruby
A.Sapphire
Boosts the likelihood of additional effects occurring.
Sun
Moon
Ultra Sun
Ultra Moon
Boosts the likelihood of additional effects occurring when attacking.
Sword
Shield
B.Diamond
S.Pearl
Boosts the likelihood of additional effects occurring when attacking.

Other languages

EnglishSerene Grace
SpanishDicha
ItalianLeggiadro
Japaneseてんのめぐみ (Ten no Megumi)
GermanEdelmut
FrenchSérénité