MrMayor
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Omnilovania: An AU Theme List by MrMayor
Fandoms: Undertale (Video Game), Deltarune (Video Game)
01 Apr 2025
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A huge list of AU themes that you would most likely find in an Omnilovania or similar compilation. I started the list for fun and decided to post it for others to see and use as a reference. Please don’t post it anywhere else. I do not claim to own any of the characters, AUs, or themes in my list.
Are you looking to make an AU and want to know if a song name or AU name has already been used? Or maybe you need to know which theme goes with which AU for some reason? Well then this is the list for you.
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Just a dumping ground for my thoughts and ideas and theories on the game. Don’t expect regular updates. Feel free to leave theories in the comments.
My Friend Code: 1055871349ML
Recent bookmarks
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“Oh?” Mutt repeated, confused.
“That’s all you have’ta say?” Red exclaimed, bemused. “Your home is gone, and you’re literally stuck in another universe! What do you mean, ‘oh’!?”
“Red!” Edge scolded, shocked at his outburst.
“What!? He should be freakin’ out right now!” Red defended.
“Maybe he’s in shock?” Mutt offered, just as lost.
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You were reincarnated to a world of war with a bundle of tiny bones in your arms. With a crazy scientists chasing you for something you don’t even remember doing, trying to escape with your little brother, living a new life that isn’t quite yours, lots of angst, NEW skeletons that probably think you’re crazy, and even more comfort… you are in for quite the wild ride.
The new chapters are now including a skeleton-house that is becoming VERY concerned for your mental wellbeing, (buried after the much-needed war-trauma,) and you have to deal with a whole OTHER group of crazy people judging you. AGAIN.
But… in order to have the best comfort fic, you sometimes need to have the worst angst beforehand.
Or, as Gaster once said… you need to break a few eggs in order to make an omelette. :] -
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This is a story for a user that wanted to stay anonymous.
This is essentially their take on an alternate way that the Delta-Ruin series I did:https://archiveofourown.org/works/21259829/chapters/50619047 could have gone. Focused on Ralsei, a dessert at a small restaurant transforms Ralsei into a thick, tall, chunky, dim-witted goat boy. Only since this is the 'Weird' route, reality is being retconned around him, and even Kris is failing to keep their original memories that Ralsei hasn't always been a giant, fatassed bimboi.
Bookmarked by MrMayor
22 Jun 2026
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The Gourmet Coast by HurdyGurdyMan
Fandoms: Deltarune (Video Game), Undertale (Video Game)
16 Feb 2024
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This fic contains weight gain, can't say I didn't warn you
Starring: FemKrisWith a handful of adventures under their belt, the $!@& Squad embarks on a new quest across another Dark World - The Gourmet Coast, a tropical paradise born from the Dreemurr's kitchen! In a world that prides itself on its unrivaled cuisine, a certain human girl with a large appetite might find it difficult to control herself... And a certain dragon girl might make some discoveries about herself too! What does the Gourmet Coast have in store for the squad? Will this sprouting friendship between Kris and Susie bloom into something more? How will this all affect Kris's waistline? Read on to find out!
Bookmarked by MrMayor
22 Jun 2026
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Kris is a little and doesn't realize it
Bookmarked by MrMayor
22 Jun 2026
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What is a Little Kid Doing up at... MIDNIGHT?! by Alpha0Marie
Fandoms: Deltarune (Video Game)
26 Apr 2026
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Kris regresses, they don’t want anyone to find out, much less the childhood friend they haven't talked to in a while…
Update because I made this summary before chapter one: Susie finds out too, and how long can Kris hide their many other secrets, especially with a certain trouble magnet lizard.Bookmarked by MrMayor
22 Jun 2026