Moon

In The Legend of Zelda: Majora's Mask, the Moon is a puppet of Majora's Mask during Link's adventure in Termina. By the power of Majora's Mask, it had been pulled from its orbit, threatening to crash into Clock Town, which would obliterate the town, along with most of Termina.

One of the interesting points of the moon is that it always faces south. The Moon also has the same eyes as Majora's Mask, perhaps due to the curse put on it. Another interesting note is that the inside of the Moon is a beautiful meadow, hazy like a dream: the only thing to break the scene was a single tree.

After Link frees all the giants, he plays the Oath to Order on top of the Clock Tower on the final night in order to call upon the Four Giants to come to the aid of the people of Termina. However, after the moon was stopped from its path of destruction, the moon then became possessed by Majora's Mask, giving it more power than before:

"I- I shall consume... consume- consume everything."

- Moon possessed by Majora's Mask

Inside the moon is the scene of the final battle in the game, and it seems that it was destroyed afterwards. The moon was one of the many mysteries of Termina that will probably never be solved. However, if Link fails to find the Four Giants in time, the Moon will destroy Clock Town and possibly most of Termina.

The Moon's Face
The Moon's menacing face is a small matter of debate. The main argument is to its existence; does the Moon actually have a face, or is the menacing visage a metaphor to the impending doom over Termina? Perhaps the Moon's face is an intimidating curse of Majora's Mask; an argument which has been put forward due to the similarities between the eyes on the Moon and Majora's Mask. Either way, the matching eyes are likely to be symbolic of the curse cast by Majora's Mask.

Other games

 * In The Wind Waker's Nintendo Gallery, there was a sculpture of the moon in the background behind the counter.
 * Also, the face of the Skull Kid in Twilight Princess bears a slight resemblance to the face of the Moon.

In Super Smash Bros. Melee, the stage "Termina: Great Bay" had the Moon from Majora's Mask in the background. As the match continued, it would slowly descend (not affecting the match in any way). The Four Giants would also come and push the Moon back up. There was also a trophy of the Moon that could be collected in the game. It's trophy description states that in the Moon is a plain broken by a single tree.