An event that happened 3,000 years before the events of Sword and Shield. It was when a black storm covered the entire Galar region. In Sword Shield, on the day the player and Leon are set to battle, Chairman Rose starts up another one on an ill-advised attempt to replenish the region's Dynamax energy at the Energy Plant. This causes the ancient Pokemon Eternatus to awaken. When it goes Eternamax, the player and Hop travel to find the legendary Pokemon Zacian and Zamazenta. With their help, they save the region.
"The Darkest Day was awesome!"
"F**king traitor.