From the Super Mario Wiki
Retrieved from "https://www.mariowiki.com/index.php?title=Robomb&oldid=2529184"
A Robomb is an object found in Luigi's Mansion: Dark Moon. First encountered in the Old Clockworks, they activate when Luigi uses the Strobulb on it. Upon activation, they chase after Luigi and then explode, causing 20 HP damage to Luigi if he is hit. The explosion can also stun any ghosts caught in it. Some Robombs malfunction; this is indicated by a different startup sound, red electric sparks around them, and the way they behave. Malfunctioning Robombs first run into place, then charge into Luigi. Greenies use these objects to hide from the Strobulb flashes. Luigi can also find an occasional Gold Robomb. They act just as malfunctioning bombs except they run much quicker and explode in contact with furniture. They release twenty five bills or five gold bars when they are destroyed. In ScareScraper they are occasionally released from inspecting furniture or using the Dark-Light Device on paintings.