Bad Dreams causes all sleeping opponents to lose 1⁄8 of their maximum HP at the end of each turn.
| Diamond Pearl Platinum HeartGold SoulSilver | Reduces a sleeping foe’s HP. |
| Black White Black 2 White 2 | Reduces a sleeping foe’s HP. |
| X Y O.Ruby A.Sapphire | Reduces the HP of sleeping opposing Pokémon. |
| Sun Moon Ultra Sun Ultra Moon | Reduces the HP of sleeping opposing Pokémon. |
| Sword Shield B.Diamond S.Pearl | Reduces the HP of sleeping opposing Pokémon. |
| English | Bad Dreams |
|---|---|
| Spanish | Mal Sueño |
| Italian | Sogniamari |
| Japanese | ナイトメア (Nightmare) |
| German | Alptraum |
| French | Mauvais Rêve |