MewAlphyne

MewAlphyne is the poly ship between Alphys, Undyne and Mad Mew Mew from the Undertale fandom.

Alarm Clock App
On Mettaton's page, he will tell an anecdote about a confrontation between himself and a "pink-haired guest" with Alphys and Undyne having to intervene. After deescalating the situation, the two of them left Mettaton and Mew Mew alone with each other. Mew Mew comments on how happy Undyne is with Alphys, with Mettaton saying that she was forcing a smile. Mettaton agreed, commenting how Alphys was happy with Undyne as well. After this conversation, they stood there in silence.

Nintendo Switch Edition
Unlocking the means to fight Mad Mew Mew reveals that, as Mad Dummy, she used to be Undyne's training dummy, but got her new body by stealing a piece of Alphys' Mew Mew Kissy Cutie merch. She took the body because she immediately knew it was her ideal form looking at it, wondering why Alphys needed a life-sized girl statue. She justifies her theft by saying that she "saved" it from being experimented on by Alphys. When she fantasizes about her "new life" ahead of her, she quickly realizes that she will still be Undyne's training dummy, but "better". She fantasizes about the idea of Undyne using her as a "pin-cushion" for her spears, calling her "sweet, violent Undyne". But reading the look on Frisk's face has her guess that Undyne already got someone else. She briefly leads on that she will "do something" to the other person, only to reveal that she means she'll respect them and wish them all the best.

In the True Pacifist ending, Mad Mew Mew returns to Undyne's house, hoping that she will come back too. She then admits that it's stupid of her to think that Undyne would want to watch her house burn down.

Fanon
Despite Mad Mew Mew's entire arc being about accepting that Undyne has moved on and is happy with Alphys, many fans like to integrate her in their relationship. Considering how both are huge fans of anime, many think that they would be thrilled to date a living version of Mew Mew. Though her feelings on the matter are never confirmed, considering her many canon crushes, people treat it as a given that Mew Mew is Alphys' "waifu", further adding fuel to the ship. Some have noticed that Undyne is often seen as lesbian, Alphys is all but confirmed to be bi and Mad Mew Mew hadn't presented femininely before possessing the Mew Mew doll, with Mettaton already semi-establishing that possession is a fantastical equivalent to transitioning; at least one artist has drawn the three with their corresponding pride flags. Though fanwork featuring all three of them is admittedly more rare than those shipping only one of them with Mad Mew Mew, most commonly Undyne.

On AO3, the tag for the ship is currently empty, but it has a small following on sites like Tumblr.

Fandom

 * TUMBLR


 * FAN FICTION

Trivia

 * The ghost inside Mad Mew Mew does appear in Deltarune as "Mad Housemate", though it is neither confirmed to be them, nor do they ever interact with either Alphys or Undyne.