Keaton

Keatons are a race of fox-like creatures. They are first mentioned in Ocarina of Time, and appear as allies in Majora's Mask and as enemies in The Minish Cap.

Keaton's characteristics are derived from the mythological Japanese fox creature, kitsune, and its appearance may also be a reference to Pikachu, or Ninetales, both Pokémon characters. They have yellow fur and three tails with black fur on the tip of each tail; Keatons are said to recognize one another by the sheen of their tails.

Ocarina of Time
The Keaton Mask can be obtained in Ocarina of Time as part of a trading quest. It is the first mask obtained from the shop in Hyrule Castle Town, and can be sold to the guard at the far end of Kakariko Village as a gift for his son. Keaton is said to be a popular character.

Majora's Mask
Keaton is a yellow fox with 3 tails that appears in Majora's Mask. To get him to appear, Link needs to obtain and equip the Keaton Mask and cut some Moving Grass in North Clock Town, Mountain Village or along Milk Road. Keaton will then appear and ask the young hero five questions about things in Majora's Mask. If he answers them all right, Link will obtain a Piece of Heart. There are a total of thirty questions that could possibly be asked. If Link does not answer the questions correctly, he can try again, but the Keaton can only be summoned once every three-day period. Choosing to summon the Keaton again and answering the five questions after receiving the Heart Piece will yield a Red Rupee as a reward.

The Minish Cap
In The Minish Cap Keatons appear as enemies. They will charge at Link and if they hit him they will cause him to lose some of his Rupees. The orange ones appear mostly in Trilby Highlands, and the blue ones appear in Dark Hyrule Castle.

Trivia

 * Enemy Keatons share similar characteristics to Tinsuits from The Adventure of Link: both have a canidae appearance, are very fast, fairly weak, and steal from Link (be it Rupees or EXP).
 * The Keatons in Dark Hyrule Castle in The Minish Cap have a different palette from Keatons elsewhere in the game, but they have the same amount of health and are identical from a gameplay standpoint. The same is true of that game's Moblins.