Sidvalink

Sidvalink is the poly ship between Link, Revali, and Sidon from The Legend of Zelda fandom.

Breath of the Wild
Revali and Sidon are not noted to have met each other at any point, due to them not having any proper meetings. Even when Link visits Zora's Domain often, he barely interacted with Sidon and often spends time with his older sister, Mipha which made Sidon envious as if he was taking Mipha away of him. Sidon does, however, properly meet Link a century later where he did not know he was the Hylian Champion who fought Calamity Ganon at first, and due to the endless rain that the area suffers from, Link cannot climb on steep cliffs as they were made slippery, forcing him to take the long way around as Sidon encourages Link each time, they cross paths. The two of them work well together as they were able to shut down Vah Ruta's water pumps where Link liberates Divine Beast Vah Ruta to finally put an end to the rainstorm forever. Link also helps Revali take back control of Divine Beast Vah Medoh after having been brought up there by Teba, and Revali came to terms with his destiny, and it was to fight with the hero.

Age of Calamity
Link helps Mipha search for the young Sidon, who had gone missing and after defending the outposts, they find Sidon on Ploymus Rock where he is in a confrontation with a Lynel. After sending it running, Sidon is safe from any further danger. Link and Revali have gotten into a conflict with each other, due to the fact that Revali's army mistook Terrako for Harbinger Ganon and thought that they were going to attack their village again, and it was about to reach a violent conclusion had Princess Zelda not intervened. Revali explains what happened that led to the Rito attacking them. Revali accepts his call into becoming the Rito Champion, but he does not hesitate to voice his suspicions about Link and asking if he really has what it takes before Terrako startles them with Impa commenting that Terrako sees itself as Zelda's knight, which Revali scoffs at this. During their mission to find the Master Sword in Korok Forest, Revali is honored to be chosen for a big role and to excel, but he gets voices sharp frustration towards Link and questions his leadership, prompting Daruk and Urbosa to stand up to him before Revali summons Vah Medoh to destroy the monsters to allow everyone access to the forest with little trouble.

When Calamity Ganon returned, the Champions' lives were on the line when they had a confrontation with the Blight Ganons and were about to face death, when Terrako's Gates of Time opened to let their descendant through and rescue them before the fatal attacks land and giving Link and his friends enough time to be able to eliminate them. Revali will voice his begrudging gratitude to Link for saving his life in the Air and Lightning scenario. If the Air and Lightning scenario is done first and Revali is chosen as a playable character by the time they have already saved Mipha and Vah Ruta, Sidon will end up joining them. Should the player switch from Revali to Sidon, Revali will say "You.", instead of Sidon's name; this is due to the fact that Revali is unfamiliar with Sidon and even if he knew the younger Sidon, he will only recognize the Sidon as a child but does not know him as an adult when he sees him, but once the Water and Fire scenario is complete, Revali will begin calling Sidon by his real name permanently once he learns who he is. They each help take back important strongholds and despite several drawbacks experienced by the time they reached Hyrule Castle, they managed to persevere in the end, with Revali telling Link to not screw this up, and Sidon and the future warriors were sent back to their time.

During The So-Called Knight challenge, Sidon and Revali have different viewpoints on Link where Sidon thought highly of Link while Revali on the other hand views him as a rival and they challenge each other through the competition in the battle between Zora and Rito, while Link shows them all that he can do.

In the secret DLC ending, Revali, Sidon, and Link spend time at Hyrule Castle with their friends as Terrako entertains them.

Fanon
Sidvalink is a rare ship within the Zelda community as shown to have fewer ships in terms of fanfics in AO3 than Sidlink, Revalink, and Sidvali as of now. Both Revali and Sidon have different viewpoints about Link, which fans do something interesting with their relationship that would end up all three of them being together by the end in one way or another. The So-Called Knight challenge has actively put them in a competition against each other as a way to challenge their viewpoints and they have Link fight each of them to see how well he fares against each of them, which fans find this part of the battle interesting.