The Moon

From Megaman Mush Wiki

Earth's Moon is, as it always has been, a large, floating dusty rock.

Recently a large cache of what was discovered to be force metal was discovered buried on the moon, and the Mavericks immediately swooped in to excavate it. A basic Maverick Base was built there, supervised by Vile, and it came to be known as Vile Palace.

A significant Maverick Hunter and Repliforce attack broke against Vile Palace, and the tide was turned when former-Hunter then-Maverick Glaive used force metal to overboost his body, defeating Sigma but destroying himself in the process.

Vile Palace was left in ruins, and it is unknown as to how much the Mavericks use it, if at all.

Also importantly, the moon has 'QUINT' etched on it visibly, or maybe it does not. The circumstances surrounding the etching or lack thereof are confusing.

Now the moon has the goddamn Robot Master city Eclipse on it! QUINT may have been beneath.