Underground

The UG is a pocket dimension created by the version of Monarch from the Dark Universe for the purpose of testing his newly-created resurrection matrix.

The UG was created shortly after he allied with DU Kakamu. Monarch also hired a group of semi-mechanical space pirates to watch over it in his absence. One day the pirates decided to have fun with it by using it to break through to the BZPB Multiverse. Once this was achieved, they turned the UG into a game, sucking in all sorts of random characters to fight the zombies created by the resurrection matrix, or each other. When Monarch returned and discovered what happened, he was furious, and so turned the pirates from overseers into enslaved inhabitants of it. He then sealed the vortex in the BZPB Multiverse that led to it, and made it so that only the technology he carries as part of his suit may open the UG.

Several years went by, and the UG laid untouched as Monarch and Kakamu worked on other parts of their plan. Recently however, following Monarch's arrival in the BZPB Multiverse, the UG has been used to store several specific entities from the multiverse that he has captured. The reason why is currently unknown.

The environment and appearance of the dimension can be changed and controlled by several encoded devices created by Monarch. The one that the pirates had access to was used to make the UG resemble Linkit once. Now however, it is but a flat surface within an impossibly large room.