Underground Laboratory

The Underground Laboratory (地下けんきゅう所あと), also known as Forgotten Laboratory (忘却の研究所), is a location from the Mega Man Zero series. It is a facility built to house ZeroXorZ and analyze him. For at least half a century, Zero, who was discovered to be the source of the Sigma Virus outbreak, was used in many Sigma Virus-related experiments. This laboratory is also where Ciel's ancestors studied Cyber-elves, and where Dr. Weil created Omega. After the Elf Wars, Zero sealed himself again in the laboratory. Because all records of its existence were wiped from history by Neo Arcadia, only a select few still know where it is located.

About 100 years after the Elf Wars, Ciel found Zero in stasis in the beginning of the first Mega Man Zero game and awakened him. Zero helps Ciel escape from the Neo Arcadian army in the abandoned laboratory and joins the Resistance.

If the Retrieve Data mission is taken, Zero returns to the laboratory to retrieve data about him and fights against Maha Ganeshariff. The laboratory is destroyed after the battle, and Cerveau creates the Triple Rod by analyzing the data Zero was able to retrieve.

In Mega Man Zero 3, Weil's Research Laboratory is an old, abandoned lab next to the Underground Laboratory, with Zero fighting Omega's final form in the Underground Laboratory. Zero discovers the truth about his body being a copy while Omega has his real body. The laboratory was apparently destroyed after Omega's explosion.

The Underground Laboratory also appears in Mega Man ZX as a data-like vision in the background of Omega's room, implying that his room in Area N may be the local he was destroyed.