Powers up the user's moves when the target is asleep.
Good Night-mare (Japanese: 相手ねむり時威力上昇Power Boost When Opponent is Asleep) is a family of skills in Pokémon Masters EX.
Effect
When the user's Pokémon attacks an opponent that is sleeping, the power of the move is boosted by 10% per rank of this skill. This applies to the Pokémon's attack moves, including buddy moves, but not sync moves or max moves.