A Rotten Eclair is an item in Mother 3. It can only be used to make trades with certain Osohe ghosts or sold for 1 DP. They can be given by a ghost to the right of the banquet room's table (by answering 'Yes' the first time and 'No' every other time), or dropped by a Zombie Man, Zombie Lady, or Stinky Ghost (10% chance, 10% chance, and 50% chance, respectively).