Underground Laboratory

Underground Laboratory as seen in Mega Man Zero.

The Underground Laboratory (地下けんきゅう所あと, Chika Kenkyuujo Ato), also known as Forgotten Laboratory (忘却の研究所, Boukyaku no Kenkyuujo), is a location from the Mega Man Zero series. It is a facility built to house Zero 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, with the help of Passy, who sacrificed herself, 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 and later the Shield Boomerang 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.

Enemies

Opening mission

Image	Name
	Golem (boss)
	Pantheon Hunter
	"Kumōteru"
	Hoppider (from Kumōteru)
	Securipider
	Pantheon Guardian
	Flopper

Standard (before Retrieve Data mission)

Image	Name
	Pantheon Guardian
	"Kumōteru"
	Hoppider (from Kumōteru)

Retrieve Data mission

Image	Name
	Maha Ganeshariff (boss)
	Ray Blade
	Flopper
	Crush Roller
	Seal Cannon
	Securipider

Standard (after Retrieve Data mission)

Image	Name
	Ray Blade
	Flopper

Cyber-elves

Image	Name	Location
	Clocpah	Item Box hidden to the left of where Zero awakened. Can be obtaining in the beginning by shoting while dashing. Cannot be obtained after the Retrieve Data mission.
	Nuppie	Item Box in a small room in the ceiling. Cannot be obtained after the Retrieve Data mission.
	Stoccue	Destroy five "Kumōterus" (Hoppider nests) during the first mission.
	Stocchu	Destroy five Pantheon Guardians during the first mission.
	Somack	Item Box that appears in the area after the Retrieve Data mission.