Ghost Block

A Ghost Block is a very rare, possessed ? Block that appears in New Super Mario Bros. Wii. Only 4 of them appear in the secret area in World 7 Ghost House. They guard a Star Coin. They resemble a normal ? Block, but as Mario approaches, they turn purple as they float over the character and throw themselves at him (a very similar mechanism is used by a Ghost Vase), breaking apart and releasing a Coin if they hit the floor or a platform. The ? mark is not moving.

Ghost Blocks also appear in New Super Mario Bros. U in multiple haunted levels.

Trivia

 * Since the question marks are not moving, when you play in on Dolphin, the Ghost Block could be mistaken as a normal ? Block more easily.