Generation Ix
Orichalcum Pulse
Turns the sunlight harsh when the Pokémon enters a battle. The ancient pulse thrumming through the Pokémon also boosts its Attack stat in harsh sunlight.
Detailed Effect
Turns the sunlight harsh when the Pokémon enters a battle. The ancient pulse thrumming through the Pokémon also boosts its Attack stat in harsh sunlight.
Pokémon With Orichalcum Pulse
5 canonical Pokémon forms can have this Ability.
Koraidon 
Koraidon Limited Build 
Koraidon Sprinting Build 
Koraidon Swimming Build 
Koraidon Gliding Build