Kori Kombat

 xIXRkq-Ybe0?t=25 The trope depicts a rivalry or conflict between the yokai of kitsune and tanuki. These two creatures from Japanese folklore have similarities such as shapeshifting, casting illusions, and a penchant for being tricksters. There is a name for these events for when these two tricksters fight called Kori no Tatakai (translates to Battle of Tanuki and Kitsune). The name of Kori comes from the kanji of kitsune (狐) and tanuki (狸) put together to make the work, kori (狐狸). Different from a battle of violence, they have a showdown with their shapeshifting powers as a demonstration of their magic. When comparing the two, kitsune usually overpower tanuki through their power, but tanuki is better tricksters. The trope in media doesn’t usually have a battle but more so a rivalry between two magical beasts. A typical example would be a rivalry between two characters who are one of the respective yokai.

Anime and Manga

 * The fight between Naruto and Gaara, from Naruto, seems to be a reference to this rivalry. They are both Jinchuriki for the Fox and Tanuki Tailed Beasts.
 * Averted with Ponchi and Konchi, from Shaman King, most likely due to being partners to their Shamans.
 * Pom Poko has an example of how the kitsune have hidden amongst humans. While the tanukis rather live in the forest despite the threat of urbanization.
 * Subverted in BNA
 * A conflict can be seen in the short made by Toho Studios called Ugokie-Ko-Ri-No-Tatehiki which translates to Moving Picture - Fox vs. Tanuki, Pulling Pranks, which can be viewed here.

Video Games

 * Referenced in Samurai Warriors with Ieyasu Tokugawa being associated with tanuki and his rival, Mitsunari Ishida, being associated with kitsune.
 * As seen in the video above, Tom Nook and Redd, from the Animal Crossing series, are both based on a tanuki and kitsune, respectively. After something between the two occurred business-wise in the past, they now have a heated rivalry when it comes to business. It can also be seen in the way they run their businesses. Tom Nook often may trick others with fast talk into paying for the products and houses he sells but are functional wares. Redd, on the other hand, lies to sells his wares while grifting them when he gets the chance. These two methods both being tricksters while mirroring the tactics that kitsune and tanuki would use, especially when competing with each other.