Creeper

Creepers are gooey, gelatinous ghosts that appear in Luigi's Mansion: Dark Moon. They have infinite HP; simply pulling in the opposite direction cannot defeat them, so the player must charge up the Shock Bar and press "A" to defeat them.

Appearance
When Creepers are first encountered, they appear as large purple puddles. When fully revealed, they are purple beings with white eyes and always-smiling mouths, two arms, and a puddle underneath.

Abilities
Creepers can turn into puddle making them invincible. Once the Dark-Light is shone on them, they reveal themselves. If Luigi walks over them when they are in puddle form, they will rise up and imprison him in their bodies, doing damage. They can also break into smaller versions of themselves.

Ghost Container Description
''These gooey ghosts just love to cuddle, and they'll never want to let you go. But after the Dark Moon broke apart, they forgot about the cuddling part. Watch out for them on floors and ceilings!''