Imposter

Transforms upon entering battle.

1 Pokémon1 as Hidden AbilityIntroduced in Gen 5

Added in Gen 5.

Found on Pokémon

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In-depth effect

This Pokémon transforms into a random opponent upon entering battle. This effect is identical to the move Transform.

Pokémon that can have Imposter only as their Hidden Ability.

Other abilities introduced alongside Imposter.

Ability	Pokémon	Effect
Sheer Force	30	Strengthens moves with extra effects to 1.3× their power, but prevents their extra effects.
Infiltrator	25	Bypasses Light Screen, Reflect, and Safeguard.
Telepathy	25	Protects against friendly Pokémon's damaging moves.
Unnerve	25	Prevents opposing Pokémon from eating held Berries.
Regenerator	23	Heals for 1/3 max HP upon switching out.
Weak Armor	23	Raises Speed and lowers Defense by one stage each upon being hit by a physical move.
Overcoat	22	Protects against damage from weather.
Sap Sipper	19	Absorbs Grass moves, raising Attack one stage.

No reader notes on Imposter yet.

“Imposter”. Pokémonism. Retrieved [date] from pokemonism.com/abilities/imposter.

Ability data from PokéAPI.