Suit of armor

Suits of armor are objects that appear in Luigi's Ghost Mansion minigame in Nintendo Land. When a ghost tracker gets noticed by one, it starts to visibly shake and produce noises. They can be temporary disabled by shining light at them with a torch. Suits of armor are also mentioned in the fourth stage description, The Storage Room, implying that they're haunted:
 * "Criminy! That suit of armor must be haunted, 'cause it rumbles when it sees people!"