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Bad Dreams

Causes sleeping foes to lose 1/8 of their max HP at the end of each turn.

Pokemon with Bad Dreams

#0491 Darkrai Darkrai

Using Bad Dreams in Cobblemon

Abilities take effect when their particular conditions are met. If Bad Dreams is marked hidden on a species above, its availability depends on the server: servers differ in whether hidden abilities come from breeding, an Ability Patch, or events.

See the Pokedex for which abilities each species can have, and IVs, EVs and breeding for how to actually pass one down.

Battle summaries use the Pokemon Showdown Generation 9 reference. Species associations come from PokeAPI. Custom server mechanics and mod versions may differ.