Contrary
Inverts stat changes.
Full effect
Whenever this Pokémon's stats would be raised, they are instead lowered by the same amount, and vice versa.
In-game description
Reverses any stat changes affecting the Pokémon so that attempts to boost its stats instead lower them—and attempts to lower its stats will boost them.
Stats
Regular ability (2 Pokémon)
Hidden ability (7 Pokémon)
Only available through specific encounters (Dynamax Adventures, Tera Raids, hidden grottoes, etc.).