Can you recommend some interesting undertale time travel stories?

Well, there's a short story where the character Alphys has an adventure on the surface world for the first time. It details her excitement and also her insecurities as she experiences new things outside of the Underground. There are also short stories that explore the backstories of the minor characters in undertale, like the dog characters and their little quirks in the Underground.

The story 'Time Travel and the Ghostly Companion' is quite engaging. A man travels through time to solve a historical mystery and is accompanied by a ghost who was a victim of the events he's investigating. The ghost helps him piece together the truth while also scaring him at times. There are also tales like 'Ghosts of Time's Passing' where people who time - travel often encounter the restless spirits left behind in different historical moments.

There's also 'Somewhere in Time'. A modern - day man becomes obsessed with a photograph of an actress from the early 20th century and through self - hypnosis, travels back in time to meet her. Their brief encounter leads to a deep and poignant love story that defies time.

One interesting WW2 time travel online story is about a modern-day historian who accidentally travels back to the Battle of Dunkirk. He witnesses the chaos and heroism first - hand and uses his knowledge of the future to help a small group of soldiers find a safer evacuation route.

There's also 'Undertale - Pokémon Crossover Quest'. In this fanfic, the protagonist is on a journey that blends the mechanics of both games. For example, battles are not just about Pokémon moves but also incorporate some of the decision - making elements from Undertale, like sparing or fighting opponents in a different way.

Sure. 'The Time Machine' by H.G. Wells is a classic. It tells the story of a scientist who travels to the far future. Another one could be 'Back to the Future', where Marty McFly goes back in time and has all kinds of adventures. And 'Doctor Who' also involves time travel, with the Doctor traveling through time and space to save the universe on multiple occasions.

In a gay Undertale story, perhaps a pair of male characters from different areas of the Underground meet by chance. They have to overcome their initial differences and prejudices. As they get to know each other better, they develop a strong emotional connection that turns into a romantic relationship, all while dealing with the unique magic and social structure of the Undertale universe.

One great time travel alternative history short story is 'The Guns of the South' by Harry Turtledove. It involves time travelers bringing AK - 47s to the Confederate side during the American Civil War, which changes the course of history in a very different way. Another is 'All You Zombies' by Robert A. Heinlein. It's a mind - bending time travel story that plays with identity and history in a unique way. And 'By His Bootstraps' by the same author also features time travel and alternative views of causality and history.

One great 'time travel Harry Potter fanfiction' is 'A Time to Remember'. It has Harry going back in time and changing some key events in a really engaging way.

Well, 'KonoSuba: God's Blessing on this Wonderful World!' has elements of time travel in some of its story arcs. It's a really funny and entertaining light novel. Then there's 'Overlord'. While not strictly a time - travel focused one, it has some aspects related to different time - related concepts in different worlds. And 'No Game No Life' also has some interesting twists that could be related to time - travel - like scenarios in a very imaginative world.