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Note: Despite sharing the name, this AU has no connections to Islandtale by Sanicbum06.
Islandtale is an Undertale AU where the Undertale characters live on an island called Island made by Undyne the Fish Warrior on Finnish MovieStarPlanet in 2016. Its story is loosely based on the 2011 movie series "Frendit" (Friends) and "Aution saaren asukkaat" (Inhabitants of an uninhabited island). It was discontinued.
The series starts with the inhabitants of an island trying to come up with a name for their home. After long consideration, Toriel decides to name the island "Island" since that's the name King Asgore would have thought of if he had named the island. Toriel decides to tell this to Asgore and Asgore agrees to announce the name in a ceremony. The ceremony is held as planned, but in the end, Asgore tells, to everyone's surprise, that he is getting married in a month.
Toriel and her friends wonder who Asgore is getting married to. Since none of them have any idea, Toriel decides to investigate Asgore's castle. She notices Asgore talking to Muffet in a way that obviously hints that the two are in love, leading Toriel to figure out that Muffet is the person Asgore is getting married to.
One day, Toriel coincidentally meets Muffet and the two talk, which leads to Toriel revealing that she knows Muffet is going to marry Asgore. Muffet goes back to Asgore's home and tells Asgore she is pregnant, not knowing Toriel is listening. Toriel reveals that she was listening, which leads to Muffet lying that she isn't pregnant because she doesn't want to reveal it to others than Asgore. This leads to confusion whether she is pregnant or not so they need Alphys to find out the truth. Alphys reveals that Muffet is in fact pregnant.
Later, Toriel hangs out in Sans and Papyrus' home along with the two skeletons, Undyne and Alphys. The five decide to play Truth and Dare. This leads to Toriel and Sans confessing their feelings for each other and Alphys revealing her cooking skills.
The next day, Sans decides to visit Toriel but she isn't home. Since Sans doesn't have a phone, he goes to search for Toriel instead. During his search, he can't find Toriel but he discovers Frisk, Chara and Asriel playing hide and seek.
Later, Toriel comes back and tells Sans that she was at an ice hockey tournament.
Some time later, Temmies invade Island in their search for Temmie Flakes. Bob, the only sane Temmie, explains to the others what is going on and some of the inhabitants of Island decide to lead the Temmies to the other side of Island since that part is uninhabited. The plan eventually succeeds and the Temmies decide to build Temmie Village there.
Asgore and Muffet decide to plan their wedding and have to decide who the best man is. Asgore decides that the wedding will have a best woman instead of a best man and that it will be Alphys.
- Toriel is the main protagonist of the series and the former queen of Island. She is the ex-husband of Asgore, mother of Asriel and good friends with most of the major characters in the series. She has feelings for Sans and the two start dating during the series. Like Sans, she loves puns. She is also an ice hockey player.
- Sans is a major character who loves puns. He is the brother of Papyrus and friends with Alphys and Undyne. He is revealed to have feelings for Toriel during the series and the two start dating. He is known to not have a phone.
- Papyrus is Sans' brother and is friends with Undyne, Alphys and Toriel. He loves spaghetti and dislikes puns.
- Undyne is the girlfriend of Alphys and friends with Toriel, Sans and Papyrus.
- Alphys is the doctor of Island and Undyne's girlfriend. She is also friends with Toriel, Sans, Papyrus and Asgore. She turns out to be a good cook during the events of the series.
- Asgore is the king of Island and a major character. He is the ex-husband of Toriel and the soon-to-be husband of Muffet. He is also the father of Asriel and friends with Alphys.
- Muffet is the soon-to-be wife of Asgore. She is currently pregnant with Asgore's son.
- Mettaton did not make an appearance during the series but was mentioned by Alphys.
- Frisk is one of the children on the island and Chara's sister. She is friends with Asriel.
- Chara is Frisk's sister and Asriel's friend. Her ringtone is MEGALOVANIA.
- Asriel is the son of Toriel and Asgore. He is friends with Frisk and Chara.
- Temmies are a mysterious species. They love Temmie Flakes. They invade Island in hopes of finding some Temmie Flakes.
- Bob is the only sane Temmie. He tells the inhabitants of Island about the Temmies.