Intimidate (ability)

Effect

Intimidate lower's the Attack of all opponents by one stage when the ability-bearer switches in (including the start of a battle).

Outside of battle

If a Pokémon with Intimidate is the leading party Pokémon, wild Pokémon are 50% less likely to be lower level.

Game descriptions

Ruby​/​Sapphire
FireRed​/​LeafGreen
Emerald
Lowers the foe’s ATTACK.
Diamond​/​Pearl
Platinum
HeartGold​/​SoulSilver
Lowers the foe’s Attack stat.
Black​/​White
Black 2​/​White 2
Lowers the foe’s Attack stat.
X​/​Y
O.Ruby​/​A.Sapphire
Lowers the opposing Pokémon’s Attack stat.
Sun​/​Moon
Ultra Sun​/​Ultra Moon
The Pokémon intimidates opposing Pokémon upon entering battle, lowering their Attack stat.