Bad Dreams causes sleeping opponents to lose health each turn. At the end of each turn, each Pokémon that is asleep will lose 1/8 of its maximum HP.
Outside of battle
Bad Dreams has no effect outside of battle.
Pokémon with Bad Dreams
|#||Pokémon||Types||First Ability||Second Ability||Hidden Ability|
| Please note that this is only 100% accurate to Generation VI games.
In the anime
|The user causes the opponent to have nightmares.|
|User||First Used In||Notes|
|Darkrai||If the opponent falls asleep when Darkrai is near, it starts to have nightmares.|
|Darkrai (M10)||The Rise of Darkrai||Debut|
|A wild Darkrai||Sleepless in Pre-Battle!||None|
In the manga
In the Pokémon Adventures manga
|The user causes the opponent to have a nightmare.|
|User||First Chapter Used In||Notes|
|Darkrai||If a person or a Pokémon is asleep near Darkrai, it suffers from horrible nightmares that can be fatal if the sleeping person or Pokémon doesn't wake up in time. The Ability is active even if Darkrai is inside of a Poké Ball.|
|Charon's Darkrai||Startling Staraptor||Debut|
In other languages
|This article is part of Project Moves and Abilities, a Bulbapedia project that aims to write comprehensive articles on two related aspects of the Pokémon games.|