Epona is Link's horse, and his main method of transportation in four games. When riding Epona, six icons (either carrots or spurs) will appear. Pressing the A button will give Epona a burst of speed at the cost of one of these carrots or spurs. After a short period of time without sprinting, the icons will be replenished.
Ocarina of Time
Epona's debut came in Ocarina of Time. She can be found in the Lon Lon Ranch with Malon as a child. She is a shy horse and will keep her distance from everybody other than Malon. When Link talks to Malon, she will teach Link Epona's Song. During this time, Epona will grow fond of Link. When Link returns as an adult, and after paying Ingo to take a ride on a horse, Epona's Song can be played to summon and ride Epona around the enclosed area. If Link speaks to Ingo while mounted on Epona, he will challenge Link to a race. Beating him twice will allow Link to keep Epona, and although Ingo tries to keep Link from leaving the ranch, he can simply jump a fence to get out.
Epona is a very useful copmanion, allowing Link to quickly and safely get from one place to another in the vast land of Hyrule. Link is completely invincible while on Epona. As an adult, using Epona is the only method of reaching the Gerudo's Fortress, before acquiring the Longshot. Epona also helps tremendously in completing the timed missions within the Trading Sequence.
When Link has returned peace to Hyrule, he returns his beloved Epona to the Lon Lon Ranch and returns to a child.
Despite the perceived importance of Epona, she is a completely optional character and she is not required to complete the game.
Epona makes a return in Majora's Mask appearing in the opening cutscene as Link is traveling to Termina. Epona is then kidnapped by the Skull Kid and disappears for a portion of the story. Link finds Epona in Romani Ranch later in his adventure, but is unable to ride her unless he manages to get into the ranch on the first day using a Powder Keg, and agrees to help Romani with her alien problem.
Although no longer the fastest method of transportation, (now outpaced by the Goron Mask) Epona could still be used to jump obstacles and get to otherwise inaccessible areas such as the Great Bay. Link is also invincible while on his steed in this game. Epona is required to complete the game.
The Minish Cap
Epona makes an appearance in The Minish Cap owned by Malon and used to help pull the wagon that contains Lon Lon Milk from Lon Lon Ranch. Epona is only in Hyrule Town whenever Malon is also in town, otherwise she can be found back at the ranch. If Link tries to talk to Epona while in his normal form, Epona will just reply with horse noises.
However, if Link is in Minish form, he can stand just south of Epona and he is close to enough to talk to. Epona will tell link to buy some Lon Lon Milk from her so that the wagon is not as heavy on the way back to the ranch. Link is able to fuse Green Kinstones with Epona. As it is a Green Kinstone fusion, it is not set to a specific treasure chest, but instead, one of the many possible treasure chests. There is one random Red Kinstone within the game that opens up a location in the Hyrule Castle Garden leading to a Piece of Heart, as well as a random Blue Kinstone that opens up a tree in North Hyrule Field leading to a Fairy Fountain. Epona is one of the many characters in which Link can make these Kinstone fusions with.
Epona accompanies Link on his adventure yet again in Twilight Princess, this time from the get-go. Epona is Link's horse, which he uses on the ranch that he works on to help him herd goats. She was to take Link to Hyrule Castle not far into the adventure, which leads to the main storyline of the game.
Epona's combat system was completely revamped for Twilight Princess. Not only is Link able to use his Bow while on Epona like in previous games, but also other weapons, including his Sword. However, he is not invincible in this game. Notable horseback battles include the two against King Bulblin and a final one against Ganon.
Breath of the Wild
Epona makes an appearance in Breath of the Wild, however an amiibo is required to cause this to occur. After making it off the Great Plateau, and preferably while Link is close to a Stable, the Link amiibo (Super Smash Bros Version) should be used, and Epona will appear.
It should be noted that this is a one-time use, even if the amiibo is used again or Epona dies, she can never be summoned into the game again. Subsequent uses of the amiibo will summon treasure chests and other loot instead. Therefore, it is recommended to register her immediately so that she can be kept permanently.
Epona is a regular size horse with maximum stats and comes fully trained.
There is a fountain that allows the resurrection of horses that have died. It is currently unknown if Epona can be resurrected at this fountain, should she die.
- Epona is named after a Celtic horse god.