WilyDrome

From Megaman Mush Wiki

The current base of the Robot Masters. It is a subterranean base capable of tunneling virtually anywhere on the planet. This helped it remain hidden from Dr. Wily's enemies until Doctor Thomas Xavier Light and a large force of Maverick Hunters and their allies arrived and engaged the Robot Masters in a massive conflict.

At the climax of the battle, Doctor Light activated a device which opened a massive subspace gate on top of the WilyDrome. Despite its attempt to tunnel out of the way, the WilyDrome was pulled into the subspace gate along with every single Robot Master on board it.

The subspace world they were transported into is now the WilyDrome's permanent residence, although Dr. Wily has managed to make it possible for himself and the Robot Masters to return to the normal world via "tears" in the fabric of reality and the planetary teleporter system so they can wreak havoc once more.