Sneaker

Sneakers are purple ghosts that appear in Luigi's Mansion: Dark Moon. They usually appear in a group of three or with two or three Greenies at most times. They have 25 HP. There is also a stronger variety which was made by the crystals in the Secret Mine.

Sneakers sneak (as the name says) behind Luigi and scare him, disrupting him while he is sucking ghosts with the Poltergust 5000. They can attack by shoving Luigi, causing him to lose HP. Although a Sneaker is normally invisible until it goes behind Luigi, the player can use the Dark-Light Device to find it while it is sneaking, or they can see the dust it kicks up in sand and snow.

Ghost Container Description
''These ghosts are swift and cunning. They love to turn invisible and sneak up behind the targets of their pranks, so use the Dark-Light Device to catch them in the act!''