Monkey

Monkeys are a recurring race in the The Legend of Zelda series. Monkeys are a race of primates. Usually helpful, these Monkeys aid Link in his various quests.

The Legend of Zelda: A Link to the Past
When he is navigating the hedge maze near the Palace of Darkness, a monkey named Kiki appears and follows Link. After exiting the maze, the monkey offers to follow him for a price of Rupees. When the two arrive at the entrance to the Palace of Darkness, Kiki offers to open the door for a 100 Rupees. After Link pays this price, Kiki unlocks the door and goes away.

The Legend of Zelda: Link's Awakening
There exists a lone monkey on the Toronbo Shores that throws coconuts at Link. Also, a monkey named Kiki aids Link later in the game, and calls his/her monkey brethren to help build a bridge.

The Legend of Zelda: Majora's Mask
A Monkey is encountered in the Woods of Mystery. It guides Link to the injured Koume. After he helps her out, they appear before Link and guides him to the Deku Palace, where their brother is being held prisoner by the Deku King. He has been wrongfully accused for the disappearance of the Deku Princess, which is really the deed of Odolwa, the boss of the Woodfall Temple. Link eventually sneaks his way into his cage and is taught the "Sonata of Awakening" to enter the Woodfall Temple. He rescues the Deku Princess and the Monkey is freed.

The Legend of Zelda: Oracle of Ages
Several monkeys appear in the Forest of Time along with many other types of animals.

The Legend of Zelda: Twilight Princess
Monkeys reside in Faron Woods. They are wrongfully considered nuisances by the villagers of Ordon Village. Early in the game, Link recovers a stolen cradle from a Monkey by using a Hawk. Talo, Malo and Beth later chase after a monkey. Link rescues both the imprisoned Talo and the Monkey. This Monkey later aids him by using his Lantern to draw away the mist in the Faron Woods.

In the Forest Temple, Link finds and rescues several Monkeys, that help him cross broken bridges by working together. Link, with the help of the Monkeys, eventually encounters the boss, Diababa. Later in the game, a Monkey appears and tells Link of the location of the Sacred Grove.

Possible evolution
In Twilight Princess, it is believed the monkeys are evolved form of the Kokiri race from The Legend of Zelda: Ocarina of Time. Both the Kokiri and the monkeys act in a very childish manner, however, monkeys in the real world can be assumed to act this way as well. Monkeys live near Ordon Village, which is also believed to be Kokiri Forest. Lastly, the female monkey has a Kokiri symbol on her shoulder.