Ghost

There are many Ghosts in the Zelda series. Most of them are known as Poes, but there are some other ghosts in the series, some are hidden, some are important to the storyline.

There is one in the Kakariko Graveyard, the ghost of Dampe the Gravekeeper. If Link beats him in a race, he will give his treasure, the Hookshot, to Link.

The Blue Bubbles and Red Bubbles are also a ghost-kind creatures. They attack by coming to Link and making him invulnerable to do something. The "Ghost Smoke" in Earth Temple is possibly the smoke around the Blue Bubble.