Keaton

Keatons (キータン, Kītan) are a race of fox-like creatures. They are first mentioned in Ocarina of Time, and appear as ally in Majora's Mask and as enemy in The Minish Cap.

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, you need 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 you some questions about things in Majora's Mask. If you answer them all right, you will get a Piece of Heart. 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.

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).