Light Labs is the laboratory built and run by Dr. Light, and serves as the base of operations for Mega Man in his efforts against Dr. Wily and his evil Robot Masters. It is also home to the various robots who support Mega Man in his efforts.
In the reality created by the second Genesis Wave, Dr. Light had created several Robot Masters, including his "children" Mega Man, Proto Man, and Roll. He was about to begin work on another when the Roboticized Masters attacked the Mega City bank and engaged Proto Man in battle. After Mega Man pursued them to Mobius, Proto Man teleported to Light Labs in order to deliver info on their Warp Ring to Dr. Light for analysis. Using it, the doctor was able to reproduce the Warp Ring and bring Mega Man back to Earth. Unfortunately, his interference was deduced by Dr. Wily and Dr. Eggman, who dispatched Metal Sonic v3.0 and Bass to capture him. Light Labs thus became a battleground as the two invaders fought Proto Man, who vainly attempted to stop them. After Mega Man, Sonic the Hedgehog, and Tails arrived, Tails worked to open another Warp Ring to allow them to go after the villains, and eventually succeeded. Roll agreed to remain behind with Auto, while the heroes and Rush headed into the Skull Egg Zone. (SU: #51, StH: #248, MM: #25)
Roll and Auto were soon able to provide help to their beleaguered friends by sending additional reinforcements: Duo and the remaining Light Robot Masters. They did so by recreating the Warp Ring, allowing their allies to join the fight. Subsequently, Light Labs and its residents were restored to their proper time and place by the efforts of Super Mega Man. (SU: #53, MM: #27, StH: #251)