“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.”
Orichalcum Pulse(JPJapanese: ひひいろのこどう) is a Pokémon ability introduced in the ninth generation. It is the signature Ability of Koraidon.
Description[]
Orichalcum Pulse summons harsh sunlight in battle as soon as a Pokémon with Orichalcum Pulse enters the battle. Its effects are the same as the move Sunny Day, which lasts only for five turns. This can be extended to eight turns if the Pokémon is holding a Heat Rock.
Orichalcum Pulse also boosts the Pokémon's Attack stat by roughly 33% (or more precisely, by a factor of 5461/4096) in harsh sunlight. This boost will occur even if the Pokémon is holding a Utility Umbrella. Skill Swap fails if either Pokémon has Orichalcum Pulse.