It habitually mimics foes. Once mimicked, the foe cannot take its eyes off this Pokémon.
It likes places where people gather. It mimics foes to confuse them, then makes its getaway.
It mimics the expressions and motions of those it sees to understand the feelings of others.
In an attempt to confuse its enemy, it mimics the enemy’s movements. Then it wastes no time in making itself scarce!
It does its absolute best to mimic the movements and expressions of its opponents, but it’s still not very good at it.
— Pokédex entries (via PokeAPI)