Generation V
Moxie
Boosts Attack after knocking out any Pokémon.
Detailed 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.
Pokémon With Moxie
16 canonical Pokémon forms can have this Ability.
Sandile 
Krokorok 
Krookodile 
Scraggy 
Scrafty 
Pinsir 
Gyarados 
Heracross 
Mightyena 
Salamence 
Honchkrow 
Litleo 
Pyroar Male 
Quaxly 
Quaxwell 
Quaquaval