Every ability

Plus

If an active ally has this Ability or the Minus Ability, this Pokémon's Sp. Atk is 1.5×.

Standard ability
5
Pokémon
Hidden ability
4
Pokémon

In detail

If an active ally has this Ability or the Minus Ability, this Pokémon's Special Attack is multiplied by 1.5.

Pokémon that can have it

9

Standard ability5Any one caught or hatched may have it

Hidden ability4Only one with its hidden ability has it