Slinker

Slinkers are ghosts in Luigi's Mansion 3. They look vaguely similar to Grabbing Ghosts from Luigi's Mansion, but act similarly to Sneakers from Luigi's Mansion: Dark Moon, sometimes scaring Luigi from behind. They can also grab Luigi and hound him, dealing damage to him over time until they are blown away. They are able to use Toad as a shield, as well as suck him into a floor portal. They can also disguise themselves as mummies.

Like Hammers, these ghosts have a pair of ghostly tails. Therefore, Luigi and Gooigi can vacuum them together, causing slamming to do double damage. When Gooigi is out, the Slinker will go after the inactive one, which can be used as bait to catch the Slinker off guard when it attacks. Slinkers have 120 HP. They are first encountered in the Thorny Bathroom of the Garden Suites.

The end of the game reveals the Slinkers were being brainwashed by King Boo, as they and the other ghosts quickly become social once the jewel from his crown vanishes from Luigi's hands as they were about to attack him. Among the rest of the standard ghosts in the game, Slinkers are seen working with the protagonists to rebuild the fallen hotel through a series of pictures throughout the closing credits.