Gold Treasure Box
From the Super Mario Wiki
(Redirected from Golden Treasure Chest)
The Gold Treasure Box is an object in Super Mario Galaxy. It appears in Super Mario Galaxy in the Bigmouth Galaxy. Instead of containing an item like other Treasure Boxes, it contains Captain Toad, who will give Mario a Power Star. However, the only way to open this Treasure Box is to throw a Gold Shell at it to break the lock.