Ten Days of Darkness
The Ten Days of Darkness is an event that occured in the Medabots anime.
Hikaru's Metabee eventually Robattled so fiercely that its Rare Medal energy caused the whole world's Medabots to riot, having their memories of being rulers of the earth and warmongers awakened by the energy. They rioted for 10 days before Hikaru made the painful decision of ending his Metabee's functions to stop the transmission of the energy, thus calming the world's Medabots down.