Moxie
Raises Attack one stage upon KOing a Pokémon.
Full effect
This Pokémon's Attack rises one stage upon knocking out another Pokémon, even a friendly Pokémon. This ability does not take effect when the Pokémon indirectly causes another Pokémon to faint, e.g. through poison or Spikes. If this Pokémon knocks out a Pokémon with Mummy, the former's ability will change without taking effect.
In-game description
When the Pokémon knocks out a target, it shows moxie, which boosts its Attack stat.
Stats
Regular ability (5 Pokémon)
Hidden ability (10 Pokémon)
Only available through specific encounters (Dynamax Adventures, Tera Raids, hidden grottoes, etc.).