Underground

Underground is mostly the same it is an underground world where monsters were living until the reboot event.

* Most of these locations are pretty much the same.

* Around the entire planet, there are many other undergrounds, that hide many secrets, some of the undergrounds are made during or before the dark age, and some are before during and after the **delta rule kingdom**

## Locations:

### Ruins:

* Ruins is an old city created long ago before the chaotic age. The story of the ruins is pretty much unknown as most of the records there were long gone. It is said that the ruins were the first kingdom of monsters, a place where Monsters were living and practicing their magic and battle power. The ruins later become one of the remaining bastions of the delta rune kingdom.

* The ruins look like an old city, have many caves and houses built inside the walls of the caves, it has a large area where monsters can walk, streets, destroyed panic of someone (probably of the one that leads the monster kind at that time), training is, shops, houses, armory, contains, it was like the current capcurrentf monsters kindom, but deep underground and more fustigated like in the way that concerning the ruins would seem impossible. In the ruins can be still found some long goneartifactss like scrolls, weapons, maps, bones, etc.

* Ruins are the first place where monsters were living after they were sealed, but when Ruins become too small monsters enters into dee part of the mountain where they found a lot of place and thanks to Gaster Invention (Core) Underground Turn into 5 areas Ruins; Snowdin; Waterfall; Hotland and Kingdom City, well maybe 6 areas if we Include Core as a Separate Area. Ruins are now abandoned.

* After the reboot, the only remaining location here are the ruins and forgotten history of the delta rune kingdom.

### Snowden

* **Snowdin** is a quiet and calm town that is close to the Ruins. Despite being Underground, Snowdin is covered in a perpetual layer of ice and snow, and, because of how cold it is, it mainly homes monsters with thick fur or monsters that do not get cold. Snowdin is also a place where Sans spends most of his free time.
* **Monsters living there:** Faun; Snowman; Inn Keepers; Rabbit Kid; Rabbit Girl and Cinnamon: Rabbit girl mother (Snowdin Shopkeeper) and Snowdin Innkeeper (sister); Gift Bear; Politics Bear; Scarf Mouse; Nacarat Jester; Slime Family, Ice Wolf; Library Lizard; Library Loox; Newspaper Editors; Grillby; Big Mouth; Drunk Bun; Ugly Fish; Red Bird; Punk Hamster.
* **Grillby's** is a pub located in Snowdin and is quite a popular place. It is named after and run by Grillby. Grillby's is Sans's favorite place to eat, and take naps. This is also a place where you can make quite a huge party.

### Waterfall

* **The waterfall** is the third area in the Underground. The area follows Snowdin Forest and Snowdin Town and precedes Hotland. Waterfall like the name says weather area, there is a lot of water, and the main area that Undynoccupiedte. But watch yourself because except Undone there is a Monster kid and he is very annoying. In the waterfall, you can find Echo flowers (one of the gaster experiments).
* **Monsters living there:** Undyne; Gerseon; Loren; Clam Girl; Small Bird; Elder Puzzler, snail's; Temmie's (they are weird and Bob; Ice cream guy (name Dave); River Person

### Hotland

* **Hotland** is the fourth region of the *Underground*, following Waterfall. It contains locations such as Alphys's Lab, True Lab, the MTT Resort, and the CORE.
* **Monsters that live there:** Clam Guy; Business Dude; Fox; Fuku Fire (Gilby's cousin); Skateboard Girl; Vulkin: Harpy; Firebird (Fuku pet); Ice cream guy (deve brother bob). Bratty and Catty: Burgerpants;

* MTT Resort is a hotel and entertainment center run by Mettaton in Hotland. It is directly connected to the CORE. This hotel is also the most popular place in the whole Underground and a place where you can take a wedding (Sans and Chara even planning to do a reservation for the wedding).

* **Reboot event:**
	+ **post dark age:** The MTT restore was built and become a very popular place, many people that survived the war seyes that place as very relaxing, thanks to the restore has a very good, opinion. In that restron you can relax, party, take a legal marriage and have a good time.
	+ In the MTT rest round, our heroes even took marine: Sans with Chara; Grillby with Muffet; Asriel with Frisk.
	+ **People working there:** Mettaton; Human Receptionist; Shambling Mass; Business Manticore; MTT Resort Janitor (a human); Fish Receptionist; Charles; Seba.

### Core:

* The core is located in Hotland. It is a technologically advanced facility that provides magical electricity to the Underground. There is an elevator to New Home in the center of the CORE.

##### **Main story:**

* After the war, when monsters were sealed, one of the main problems was a lack of pawer, so Dr. W. D. Gaster decide to fix that problem, with the permission of the king, Gaster with the help of scientists and workers they build the Core that uses Hotland lava as energy. After that Core become also the main research lab, where Gaster can work on the machine that will free the monster, and he could focus on the side project that allows him to see others Au's and timelines. Besides that Core is also called the most spooky place in the whole underworld, probably because there are strange noises.

* **Reboot:**
	+ After all the things with demons and other shit that happened during the dark age, Gaster with his son Sans, Alphys, and other scientists (human and monster scientists) with the approval of both king of humans and monsters, create the core, as a proof that humans and monster can work together and as a proof that the alliance still stand. The location of the core is known to few as there would be no one that wants to destroy the piece (for example, humans that are part of a cult known as "shadows").
	+ The core is way more bigger and advanced as both human and monster scientists worked together, so the core has enough power to give energy to the whole Kurina island.
	+ The core becomes a "symbol of peace" between humans and monsters. Destruction of the core would mean the end of peace and a declaration of war.

##### true lab:

* **Pre and post reboot:**
	+ **Pre reboot:**
		- The true lab is right under the Core, unlike in the original true lab isn't abandoned;
		- A true lab is a place where Gaster is doing his experiments, like a for example machine that can absorb any kind of energy (it is a prototype but gaster thinks that it could help to destroy the barrier). But you must be very careful because the paths are treacherous and you can be lost (the last person that was lost there, was found 2 months later).
	+ **Post reboot:**
		- After the core was built

### Kingdom city/New home

* Kingdom city in Original Au is called "New home", but in undercore is called the "Kingdom City" because the city is well advanced as well as it has the larges territory side.
* Kingdom City is a big city where every monster can live. In the kingdom, City is a new Royal Castle where Asgore Toriel Chara, and Asriel live.
* Kingdom City has Hospitals, many houses, a guard post, a clothing store, a shop store, end center.
* Under the kingdom city, are many bunkers and a set of tunnels, that were used by civilians during the genocide round, to hide from that creature.

## Trivia

1. Underground in Undercore is 6 times bigger than, the original underground from undertale.
2. Underground existed before since there were ruins of the old city there.
3. The Underground was able to fast evolved thanks to Gaster's knowledge and all resources that were inside the underground and were gathered by people during the war.
4. Ruins of the underground are the last moments of the ancient kingdom known as delta rune-kingdom.