Undertale AU Wiki

Welcome to the Undertale AU Wiki, the main place for documenting Undertale's AUs. If you wish to contribute, just know that it is REQUIRED for you to read the Rules and Guidelines and the Policy of the Wiki BEFORE doing so.

As this is an AU Wiki, this wiki is NOT meant for characters. The Undertale OC Wiki exists for those. This Wiki is also not meant for AUs that do not have presence anywhere else, and those should be put on the Undertale AU Ideas Wiki.

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Undertale AU Wiki
Undertale AU Wiki
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* But nobody came.

* This article contains information that is from a cancelled AU, an AU that has been put on an "Indefinite Hiatus", or an AU that has not had a story update in a year. As such, some information here may not be found in any established story, and could be considered non-canon.

Time of Last Story Update: November 8, 2021

Time of Cancellation: Absentia

For other versions of Underswap, see Underswap (disambiguation).

Storyswap: Showtime! is a take on Storyswap where only the shifted characters swap. While the Protagonist role is taken by a different human, Frisk still exists and takes an original role.

Years before the story of SS: Showtime!, there were 2 skeleton families, the Asters and the Skeletons. After the war, the last ruler of the Asters, Empress Helvetica Aster, was executed by humans and (rightfully) blamed for escalating the conflict by monsters. Thus, the monsters decided to dethrone the Aster family, and Semi Skeleton, a war hero who fought side to side with Gerson Boom, was elected ruler.

Years later, W.D Gaster, the last descendant of the Asters built a powerful robot made for human eradication, Mettaton. However, when he showed it to the current king, Papyrus, he deemed it too dangerous and, not knowing a ghost possessed the machine, ordered Gaster to destroy it. When Gaster was taken into arrest for making devices that threatened monsterkind's safety, he tried to escape, but got killed in the progress.

In the garbage dump at the entrance of the old Semi City now lies the robot's broken and deactivated body. What's inside? A ghost hell-bent on revenge...

Character Changes[]

  • A boy named Isaac is the Protagonist
  • Napstablook is the Fallen
  • Mettaton is the Empty One and Soulless Angel
  • Sans is the Caretaker
  • Undyne is the Recluse
  • Asriel is the Judge
  • Chara is the Ambitious
  • Asgore is the Captain of the Guard
  • Toriel is the Royal Scientist
  • Alphys is the Celebrity
  • Papyrus is the Monarch
  • Frisk still exists, and has a unique role

Isaac[]

Isaac is the protagonist, a smart and nerdy boy with the soul of Curiosity. He fell into the Underground while researching a rare mountain flower.

Napstablook[]

Isaac's companion, a shy ghost searching for his missing cousin Hapstablook.

Mettaton[]

After being trapped in a deactivated body for many years, he grew a hatred towards king Papyrus.

Sans[]

One of the 2 kings of monsterkind, together with his brother Papyrus. He resides in the old Semi City to give the humans their judgement before they may proceed to the more populated areas of the Underground.

Undyne[]

Undyne went to Semi City to kill humans before they could do any harm to the rest of the Underground.

Asriel[]

Asriel is the son of Asgore and Toriel, and holds a deep secret.

Chara[]

Chara is the adopted child of the Dreemurrs, and the Royal Guard's second in command. She is a fanatic human hunter.

Location Changes[]

Semi City[]

The old city of monsterkind, built by and named after Semi Skeleton.

Frozen Wasteland[]

A cold tundra with only a few paths cutting through the emptiness.

Frozenover[]

A town located in the middle of the Frozen Wasteland.

Overgrown Lake[]

A lake surrounded by a dense jungle with many islands scattered throughout it. The guard has their base here.

The Steamlands[]

An industrial complex that heavily uses steam created when the lava below collides with the water flowing through the river connecting Overgrown Lake to function.

The GAMMA Zone[]

A nuclear power plant built high above the Steamlands

Great Papyrustopia[]

A snowy city designed by the great king himself.

The Great Palace[]

Papyrus's palace, located at the end of Great Papyrustopia.

Story[]

Gallery[]

Trivia[]

  • Isaac is named after Isaac Newton, both out- and in-universe.
  • Isaac's design is inspired by Jeff from Earthbound.
  • Chara's design originates from an old Storyswapfell take the author made.
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