Ability · Gen 8 · 1 Pokémon
Mimicry
This Pokemon's types change to match the Terrain. Type reverts when Terrain ends.
This Pokemon's types change to match the active Terrain when this Pokemon acquires this Ability, or whenever a Terrain begins. Electric type during Electric Terrain, Grass type during Grassy Terrain, Fairy type during Misty Terrain, and Psychic type during Psychic Terrain. If this Ability is acquired without an active Terrain, or a Terrain ends, this Pokemon's types become the original types for its species.
Mimicry was introduced in Generation 8. 1 Pokémon and forms can have it.
Pokémon with Mimicry
As a regular ability (1)
Galarian StunfiskMimicry FAQ
What does Mimicry do?
This Pokemon's types change to match the active Terrain when this Pokemon acquires this Ability, or whenever a Terrain begins. Electric type during Electric Terrain, Grass type during Grassy Terrain, Fairy type during Misty Terrain, and Psychic type during Psychic Terrain. If this Ability is acquired without an active Terrain, or a Terrain ends, this Pokemon's types become the original types for its species.
Which Pokémon have Mimicry?
1 Pokémon and forms can have Mimicry: Galarian Stunfisk.
Effect text from Pokémon Showdown (MIT); which Pokémon have it from Showdown's Pokédex, cross-checked against PokéAPI. Unofficial fan site.