Pona

Pona is the het ship between Popo and Nana from the Ice Climber and Super Smash Bros. fandoms.

Ice Climber
In the original game, Popo and Nana were said to be two people living in a village at the foot of a mountain. Suddenly, a Condor comes by and sweeps all of their village’s vegetables away to its nest at the top of the mountain. So Popo and Nana try to climb the mountain and get their vegetables back. Popo and Nana are controlled by Player 1 and Player 2 respectively and are assumed to work together in order to climb that mountain. In Vs. Ice Climber, the arcade version, they see climbing the mountain as a competition.

Super Smash Bros. Melee
The Super Smash Bros. series shows the two of them being the only characters to fight as a tag team. When Nana goes down, Popo remains standing and vice-versa when playing as an alternate costume. Up until Ultimate, the one who remains standing stays the same after their partner gets knocked out. Ultimate made them significantly weaker.

The trophy of their sprite claims that they have climbed “many an ice summit in their mountaineering careers”. It says that they “chased” vegetables that “inexplicably” fell from the Condor’s Mountain. It also points out that they’re rarely seen apart. Their Adventure Mode trophy points out that a solo Ice Climber won’t be able to make teamwork moves, admitting that it makes the fight harder. It also points out that the “Squall Hammer” is at its strongest when Nana and Popo combine their strength. Their All-Star Mode trophy points out that the “Belay” is best to cover great distances, but won’t allow them to control their landing. It also says that the “Blizzard” is best use in close quarters and that Nana and Popo will freeze their opponents sometimes.

Super Smash Bros. Brawl
Their trophy states that they use their “incredible jumping powers and hammers” to climb to the summit by breaking blocks. They also “grab veggies” and when they catch the Condor at the end, they supposedly “conquer the mountain”. The game also gives them a “Final Smash”, the Iceberg, by which they summon the Iceberg from their original game to freeze their opponents and send them sliding.

The Subspace Emissary
Their role in the story mode is comparatively minor to other characters. They’re first seen climbing a mountain for vague reasons. Seeing Meta Knight going past them, they thought he was bragging about getting to the summit first and get more motivation to reach the top. Hi-fiving after their “victory”, the Ice Climbers witness a confrontation between Meta Knight and Lucario, but keep themselves out of it. Though they are fairly relieved to find out that the loser will be revived by the winner, their relief doesn’t last as they fail to board the Halberd with the two of them and are thrown back to the ground towards another group of fighters. Teaming up with other heroes to fight the Subspace Army and enter Subspace itself, the Ice Climbers are quickly defeated by Tabuu and turned into trophies. Alongside everyone else, they are rescued by Luigi, King Dedede and Ness and join everyone in a final fight against Tabuu.

Super Smash Bros. for Wii U and 3DS
This is the only game in the series since Melee to not have the two of them playable. They do appear as a trophy, which states that they defeat animals/critters and only mentions the Condor as a challenge for bonus points. For whatever reason, the audience cheers their names when the Villager is fighting.

Super Smash Bros. Ultimate
Much like the rest of the of the cast, Popo and Nana were also disintegrated and turned into vessels for Spirits, though not on-screen. Unlike other potential couples, Popo and Nana can’t save each other, since they are trapped together and have to be freed as a unit.

Fanon
Pona is a rarepair in the Super Smash Bros. fandom. Though the characters originated in the NES game Ice Climber, most people were introduced to that game through the SSB series. The characters are generally considered to be defined by whatever information about them the players could read from their appearances in Super Smash Bros., plus the plot described in the manual of their original game.

Nintendo has never given an official explanation to what exactly their relationship is, they could be anything between siblings, cousins, really good friends, platonic partners, rivals and lovers. Those who interpret them as lovers ship the pairing, those who see them as related ship them with other characters. Nana was especially popular in Brawl, because she's the closest thing Smash had to a playable little girl, thus people really enjoyed shipping her with Ness and a few other young boys in the cast.

Fandom
FAN FICTION

Trivia

 * In Animal Crossing, there is a villager named Nana whose catchphrase is "Popo", this may or may not be a reference to the Ice Climbers.
 * The German translation of every Super Smash Bros. game since Melee renamed Popo to "Pepe", since "Popo" is slang for "butt" in that language.