Bad Dreams ナイトメア is an ability exclusive to Darkrai. It makes any sleeping Pokémon lose HP over time. It is similar to Nightmare.
Pokémon
Pokédex
|
Pokémon
|
Sprite
|
Type
|
Obtained
|
Abilities
|
HP
|
Attack
|
Defense
|
Special Attack
|
Special Defense
|
Speed
|
#491
|
Darkrai
|
|
|
Natural
|
Bad Dreams
|
70
|
90
|
90
|
135
|
90
|
125
|