Keaton

Keatons are fictional fox characters that appear in The Legend of Zelda: Majora's Mask. They are magical creatures that bear the appearance of a golden fox with three tails. They also sport black fur at the tips of their ears and tails. The oddest feature about these creatures is the facial expression they have is that of closed eyes. Keatons recognize each other by the sheen of their tails, as explained by the Keaton in The Legend of Zelda: Majora’s Mask.

They are wise creatures that appear only to those wearing the Keaton Mask, however, these creatures are not fooled by one wearing the Keaton mask. They will reward an honest person if they are able to pass its test of answering 5-7 questions. Though they may seem shrouded in mystery, they are only around to help. If you answer the Keaton’s questions, referred to by many as the "Keaton Quiz", they will give you a Piece of Heart.

Ocarina of Time
When you are still Young Link, you can visit the Happy Mask Shop in Hyrule Castle Town and borrow the Keaton’s mask. To sell it, show it to the guard standing in front of the path to Death Mountain. The guard says that Keaton is a "popular character" and that all of his son's friends have a Keaton mask, and that his son wants one as well.

A lot of early media mistook this mask to be a reference to Pikachu.

Majora's Mask
In The Legend of Zelda: Majora's Mask, the Keaton makes a main role, or, at least, semi-main. The Keaton appears when you wear the Keaton’s Mask while near a circle of moving bushes. After the bushes are gone, the Keaton will spin out of the ground poised to ask you its questions. If you answer the Keaton's questions correctly, it will give you either a “Piece of Heart.” or a red rupee (worth twenty Rupees).

Enemy Appearances
The Keaton also takes an enemy role when in The Legend of Zelda: The Minish Cap, placed there because of Vaati's dark magic. They wield swords and bear an "X" on the heads and come in two colors: red and white. These Keaton are underdeveloped (Noted by the single tail) and under the influence of Vaati's dark magic.