May inflict a bad status condition on the attacker who hits it with a direct attack.* When the Pokémon is hit with a direct attack like Tackle or Scratch, the attacker is sometimes afflicted with the Poisoned, Paralysis, or Sleep status condition!*
When the Pokémon is hit with a contact move, like Tackle or Scratch, the attacker is sometimes afflicted with the Poisoned, Paralysis, or Sleep status condition.
In the anime
Effect Spore played a major role in The Power of Us. Team Rocket attempted to raid Fula City's Pokémon Research Pavilion, but only got away with a solution of Effect Spore made by Toren. They later dropped it on accident, which released a toxic gas that in turn triggered a devastating fire. Both disasters endangered Fula City, but Ash and the citizens worked together to successfully combat both.
In the manga
In the Pokémon Adventures manga
Whitley's Foongy is revealed to have Effect Spore as his Ability.
Of the four Abilities that may inflict a non-volatile status condition upon contact, Effect Spore is the only one that has not yet been activated in the Pokémon anime.
Effect Spore is the only Ability that can cause sleep.