Shadow Ghostly Prison had many forces, but only one force was powerful enough to cope with the Dark Shadow Clan: the Fighting League!
The Fighting League was formed by many forces of different races. Initially, it wasn't concentrated. When the Dark Shadow Clan arrived and began to invade everywhere, the scattering forces of the Fighting League became more solid. They started to compete with Dark Shadow Clan to control Shadow Ghostly Prison.
Most of the time, the Fighting League had the upper hand. Even in the most fierce and bloody battles, they were the ones who stood and smiled at the end.