Guard Down

When this Pokémon enters battle, the opponent's Defense is lowered by one stage. In a double or triple battle, all adjacent opponents are affected.

This ability also takes effect when acquired during a battle, but will not take effect again if lost and reobtained without leaving battle.

This ability has no effect on an opponent that has a Substitute, or on opponents with the abilities Inner Focus, Oblivious, Own Tempo, or Scrappy.