Undercore

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* 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: July 27, 2021

Time of Cancellation: March 19, 2023

* (Seeing an article of an AU you can freely make content for...)

* (It fills you with determination.)

This article is about an AU that has been deemed community-shared, either by the author declaring it, or from long-term abandonment by the author. For elaborated information on community AUs, see the Templates policy page.

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For CORE Frisk's AU, see CORETale.

Undercore is an AU by Secreat. It is a written story originally written by Secreat on the Undercore wiki. It has been re-posted onto Wattpad with Secreat's permission.

Undercore is a very mysterious and old AU that existed while the Alphatale was not yet destroyed. Undercore is one of few AU's/places that are hard to find and gain access to unless you are from that AU, if you are not from that AU it is impossible to enter this AU unless you know its location. Undercore is protected by a mystical barrier made by a god "Creator", this barrier hides Undercore from the sight of anyone outside, so it is hard to find an entrance to that au (until the barrier was eventually destroyed by the inside). Undercore has two stories. The first one is like in other Undertale AUs and involves a war against humans. The humans eventually won. After the monsters lost, they were sealed under Mt. Ebott. However, in reality, a third race manipulated humans to start the war. The second story is happening after the reboot event.

Characters[]

Undertale Characters[]

Alphys[]

Alphys didn't much change, however, after the event, Alphys not only become a scientist but also an engineer. She invented a gun and used it during the final battle (she gained some exp). Besides, nothing has changed,

Annoying Dog[]

Annoying Dog is first introduced in the dark age in the temmies village. He was the first one that tried to steal the light but he ended up dying and so he become an annoying dog. After he became the dog, he gained the power to see the future and banish people that are trying to steal the light and knowledge in which he knows the beginning of the beginning (he knows how undercore was made and why).

Asgore and Toriel[]

Asgore, along with his wife, Toriel, is a ruler of the monster kingdom, and later becomes the king of the underground. He is a kind person, but when he is provoked, he is very scary. Like his son, he speaks in southern slang (most notably "howdy" and "golly"). He is a powerful leader that will do what is needed to keep his kingdom safe. He is very bad at naming (for example, he wanted to call his son “Torgiel”). After the reboot event, he remains the same.

Toriel is Asgore's wife. She is a very kind and nice person and is very strong. She enjoys cooking and baking a butterscotch cinnamon pie. Toriel likes making puns and took care of Sans when Gaster was away. She is the adopted mother of Chara and the biological mother of Asriel. Toriel will do anything to make sure that nothing bad happens to her family.

Asriel and Chara[]

Asriel is the biological child of Toriel and Asgore and the younger brother of Chara. Asriel has many abilities, such as flying, and he is very good at both close and long-range combat. Asriel is friends with Papyrus and Frisk, and they make quite a team. Asriel is a prince and the future king of monsters, he is a good warrior and politician thanks to his parents teaching him.

Chara is a human with a Determination soul. Chara is very good at using magic as well as fighting, but she is very bad at showing others that she loves them. Chara is the 3rd strongest character in Undercore. She is very dangerous when she fights seriously and she is even more dangerous when she is teamed up with Sans. Chara can use “shortcuts”, and, like Sans and Gaster, she remembers the resets. Chara doesn't or doesn't want to remember anything about her past cause every time she tries to remember she feal pain lot of pain.

Frisk[]

Frisk well mostly was the same until the event. After the event frisk didn't go to Mt.Ebott and stayed at home living with her family until the dark age begone and her world turned upside down. During the dark age, she becomes a vigilante/mercenary that helps people and hunts demons. She is the last member of her family and the second living human with Dt-soul.

Gaster[]

Gaster is the most powerful being in Undercore. He is the father of Papyrus and Sans and the older brother to Julie. Gaster is a very smart person and also very scary, he has a big issue "when he got an idea nothing can stop him from making that idea real that's why he made sans and papyrus". Unlike most of his other versions, he never fall to the core and lived his life with his sons. He also was born with unique magic known as void magic (the magic that was seen only in Gaster ancestor W.D.Zegrid). His void magic gives him control over the void he can enter and leave the void.

Gerson[]

Before Undyne, Gerson was the leader of the royal guard. He is a very good friend of Asgore since he was his strategic adviser during the war against humans. After the monsters were sealed underground, he took care of Undyne and made her the new leader of the royal guard. After the reboot, during the dark age, Gerson was the one that train undyne, and become her mentor and hero,

Grillby and Muffet[]

Grillby is a friend of Muffet, Sans, and Chara. He is a good and loyal person that you can rely on. Grillby opened a place in the Underground where you can eat or party. After the reboot, Grillby has become a member of a team called blue wind. During the dark age after a time skip, Grillby gains the title "Fire Demon". Grillby has a great talent at fire magic and making deals thanks to his father's teachings.

Muffet is a spider monster. She is a friend of Sans, Grillby, and Chara, and they all like adventuring and hanging out with each other. Muffet is not only a good friend - she is also a very good warrior and knows how to fight thanks to her mother. Muffet is also very good at making tea, coffee, and muffins. Muffet is also called "The Spider Queen"

Mettaton[]

Mettaton is the same as the original, but the only difference is that Undercore Mettaton's normal form is his EX form.

Papyrus[]

Papyrus is Sans's younger brother, and, like his aunt, he is a very kind and positive monster. Papyrus is a good friend of Undyne, Asriel, and Frisk. For some reason, he is interested in meditation. Papyrus is one of the strongest monsters in the Underground. Papyrus is very dangerous when he loses his temper. Papyrus sometimes takes care of Gaster and Sans.

River Person[]

River person is very mysterious. No one knows very much about him, and he technically doesn't exist. He is a very quiet person. He is as old as the gods themselves. River person can be found "At the end of the road". He is the 4 powerful being inside Underscore, River Person possesses the weapon that can kill Fresh Sans. River person has many secrets that he likes to never tell, like him being part of the Order of light.

Sans[]

Sans, unlike his Undertale counterpart, is more active, he knows when to intervene. His favorite food is a hot dog and he likes adventuring. Sans is Papyrus's older brother and Gaster's first child. He is also Chara's best friend and boyfriend. Sans is also Gaster's assistant. Like his father, he likes puns and can be hyperactive at times. Sans can also be a little overprotective of his younger brother. Sans is the childhood friend of Muffet, Grillby, and Chara. He knows how to combine different types of magic together. After the dark age, Sans changed. Sans became much more serious; he stopped making jokes and started to antagonize his opponents. However, when Sans tells a pun, it means that something is about to happen.

Temmies[]

Before the event, Temmies were the same, but after the event, Temmies changed, and now they can see the future. However, they are still clumsy. The event also changed the origin of the Temmies. Now, they are the shell of dead people who wanted to take the light for themselves.

Undyne[]

Before the event, Undyne was the original leader of the royal guards that protect the underground. She acts quickly on her ideas and loves to help others, including being a mentor to Papyrus. Undyne dislikes puzzles and enjoys anime, which is an affinity that she shares with her romantic interest, Alphys. Undyne is an orphan, but that didn't stop her. After the event and dark age, Undyne is still the same person. However, she became a very big figure - after all, she is called "The Spear of Justice".

Added Characters[]

Player/Noah[]

He is not only a part of the 3 races but also the only one that exists inside Undercore (at least before the event happened). After he stayed inside Undercore, his appearance changed. Now he looks like he is made of hate and the only things that you can see except that hate are red eyes and a red smile.!@&$%^ and the others like him that go outside of Undercore are called "Fake Players" by a whisper. After the reboot, he, his brother, and his sister were sealed in the dark realm, and they turned into demons. His personality is the same - he is sadistic and likes to see others suffer, and he is a masochist, and he reviled his name as Noah.

Michael, White Fox, and, Dark Wolf[]

Michael is the 3rd god, sibling to White Fox and Dark Wolf, and the creator of the third race known as !@&$%^. Michael, like his siblings, was adopted and raised by him. Creator, like his sister and brother, has a special ability. He controls life and death, and he has quite an ego. Michael, unlike his siblings, is a more human-looking creature than an animal. In the religion, he is called creator cause that's how they see him as he was show to be stronger then his siblings.
White fox and Dark wolf are siblings to the creator. They have the same power level but have different powers. White Fox can control the force of nature and Dark Wolf can control time and space. As the creator, they were his adopted children of him. White Fox is a calm and patient goddess. She is also known as the mother of all monsters. Dark Wolf, unlike his sister, is more aggressive. Dark Wolf is the father of all humans.
All three of them are children of Whisper.

Demons[]

Demons came to exist after the reboot, they were trapped in hell for a long time. No one knew about their existence until they escape and the dark age begone. Demons seak only to destroy, corrupt, and rule the world

Dragons[]

Dragons were the 3rd race that lived in undercore, the dragon was a pride race that saw others as inferior to them, they despise lies and cheating in with that lead them to be easily corrupted by evil, And so the dragon betrayed gods and try to kill them. The only difference that the event done to dragons was that the dragon betrayed the gods earlier.

Guardian[]

Guardian was made by The Orb after He sent the orb to the null zone. There is nothing that says anything about him. But one thing is known for sure - he is not a guy that you would fight with. Guardian is the first one to gain the ability to transform. He is enough power-full to kill beyond Sans.

Julie[]

Julie is Gaster's younger sister and the aunt of Sans and Papyrus. She likes to smoke cigarettes when she is under stress. She is kind of like Papyrus, but she knows how to scare people. Julie is a healer - she knows how to save people from death. Julie in her young age called Scary Julie by everyone in the Pirate seaport. Julie before and after the event is the strongest female in the world.

Whisper[]

Whisper is a voice that guides the 3 gods to creation on everything in the Undercore. There was only one time when he revealed his true form, as a skeleton with weird markings on his head and white cloak. He tells Sans and Chara everything and lets them decide their own Fate.

Jennifer[]

Jennifer is a cat monster, she is a pirate and she is an old friend of Julie and her old rival. Julie gives Jennifer the nickname Jeni. Jennifer is a very sneaky cat that can betray you or save you. She always wants something in the exchange for the work/deal.

Primordials[]

Primordials are an ancient race that existed a very long time ago, they were the first ones in the Undercore. Primordials have been protecting a mysterious object that unfortunately has corrupted them, they were eventually destroyed by Whisper and two others. After the reboot event happened Primordials has started slowly returning to bring chaos and destruction.

Anna[]

Anna is a child of the Bone Primordial and she is a Primordial slayer (nickname titan slayer or pink demon), she is a strong warrior that has the power to kill the Primordial slayer. Anna has slain a few Primordials slayer and after them all being defeated, she like her father has gone and turned into pure essence to cure the Undercore of the corruption that the corrupted Primordials have to give to the Undercore. After the reboot event, she has returned, in order to stop the titans from coming back, and destroying them permanently.

Zenit[]

Zenit is a very old being that has arrived at the Undercore long before the titans were put to protect the spark of darkness. Zenit is the first villain in Undercore history to make Whisper intervene and rake him down, it is known that Zenit fought against Whisper for 20 days and nights until Whisper won and did a very terrifying thing to Zenit in which Whisper make sure that only the Artifact called the book of creation to have any records of that day. What secret is behind him?

Locations[]

Added Locations[]

Dark Realm[]

The dark realm is the homeworld of the fallen (also known as demons). The dark realm is very cold. The sky is red, there is darkness everywhere, the earth and plants are dead, and there are lava rivers. The dark realm can also corrupt your mind and can cause you to start hearing voices, then see illusions, and then it will finally make you try to harm yourself. There are 2 ways to enter the Dark realm: one, you are evil and die, and second, you enter by the Gates of Hell. Essentially, this place is hell.

The Light of Purity[]

The light of purity was originally called the Tree of Hope, but the light coming from the tree was so bright that everyone started calling the tree "The Light of Purity". This place is one big tree from where light emerges that can heal anything from corruption to a deadly wound. After many people started to try to steal the light for themselves, the light created a magical forest so that only those that are worthy can see the light. Those who are unworthy will be turned into Temmies. The light of purity is placed on the island where the temmies village is.

3 Gods realm[]

3 gods realm is the opposite of the dark realm. It is full of life, light, and positive energy, and the only way to get there is to be a good person and die. There are some rumors that there is another way, but it has never been confirmed. Essentially, this realm is also called heaven. In that realm are interesting artifacts like Positive and Negative Apple.

The World of Dragons (Fallen City)[]

The World of dragons is/was a floating island where only dragons can enter. The island has many mountains and a very big forest. The world of dragons is called the Fallen City because after the dragons disappeared, the island started to lose the magic energy that makes the island float. Now it's nothing but a destroyed island on the ocean.

Void[]

The void is like many others void in the multiverse but in reality, is something much more. Gaster's can access this place, at any time, in any place, and do many secret things. From the void, Gaster has access to other places (for example, the save screen or dark realm). The only places that he can't enter are the anti-void, the 3 gods realm, and the Abyss. Inside the void, Gaster can observe other AUs and timelines. The void is a very mysterious place that holds many secrets, that we don't know about.

Seaport of pirates[]

This seaport looks like a normal seaport for pirates (if you watch "pirates of caraibes" then you know). It's a place where Jeni spends most of her time.

Aru island[]

Aru island is an island full of sand and sun, on Aru island they live humans and monsters (like cats). Aru island starts existing after the reboot event. Aru Island knows about the titan's existence, Aru island was attacked by demons where the dark age began. Aru island has a culture similar to the Egyptian culture.

Okami island[]

Okami island-like Aru island starts to exist after the reboot event. Okami island has a culture similar to Japanese, they have samurais, and have their own religion. There are live monsters, humans, and also demigods. To enter Okami island is the hard cause of the oceans, like Aru island Okami island was attacked by demons during the dark age.

Forge[]

The forge is a mysterious place that exists before the beginning of time, was built by an unknown entity that made the forge of time in order so the time would start existence, causing the forge of time to give birth to the time itself. It is a place from where time and space come to exist, the only way to enter the place where the forge of time is located is by using one of ten multi-dimensional maps that have access to any place where time is existing. If the forge was destroyed time would stop existing and everything would be destroyed forever, and the only ones that would live are people that somehow are in there.

Miscellaneous[]

Chara and Asriel are alive.
The war had already started when Chara was adopted by Toriel.
There are new races.
Gaster never fell to the core.
There are no amalgamations.
Humans can use magic.
Monsters can use more types of magic.

Story[]

The rest of the story cannot be told yet.

Battle Royale