Mad Piano

The Mad Piano is probably one of the scariest creatures in Mario history. It only makes one appearance; in Big Boo's Haunt. At first it looks like an ordinary piano but when Mario, Wario, Luigi, or Yoshi get close to it, it will attack and possibly try to eat them. The Mad Piano can not be killed so just try to avoid it, however it's protecting a red coin. So to avoid the Piano, grab the invisible cap and it won't attack Mario, or the other.&nbsp