Underground's Champion

by Quatermass

(Female Chara!) Years ago, the Dursleys hurled Harry Potter into a river that led underneath Mount Ebott. Now, the Goblet of Fire brings Harry and his new family into Hogwarts, shattering the Barrier around Mount Ebott in the process. How will Magical Britain react to the Monsters, and to a saviour raised by them? And what dark secret does Chara, Harry's girlfriend, hide?

1. Foreword

FOREWORD

I really have to stop these plot bunnies from copulating. This is getting ridiculous. And yet, it happens. I blame my newfound obsession with Undertale. I've done three crossovers beforehand: a one-shot with FEAR called Dum Spiro Spero, another oneshot with Death Note called Queen of Spiders and Greatest Detective, and a lengthier one with Final Fantasy X called What Lies Beneath. I might as well jump on the Harry Potter/Undertale crossover bandwagon as well.

A lot of the Harry Potter crossovers with Undertale, rather understandably, have Harry falling into the Underground. While it was somewhat appealing to me to have Toriel adopt Harry, the truth was, it didn't seem like much of a story in the end, and to follow the same route as so many others was doing didn't appeal to me. I then had the oddest bit of inspiration, where I had this notion of Undyne being related to Lily Potter. That became the original version of Underground's Champion, but I realised that the worldbuilding was awkward, and so too was the bashing. And I try only to bash when it suits the plot of a story.

One possible idea I had was Harry, instead of falling into the Ruins area and being adopted by Toriel, was of him falling into the Garbage Dump, and getting adopted by Alphys. I had considered doing it as part of the game's story, but then, another idea occurred to me, and I decided to use the basic plot of Underground's Champion (Harry getting dragged from the Underground into the Tri-Wizard Tournament), and so I set it before the beginning of the game, with Asriel and Chara still alive and well. And for the Undertale purists, yes, I have made Alphys the Royal Scientist and Undyne the Captain of the Royal Guard long before they would have done so in the game's timeline. It's an AU.

Anyway, time for the usual disclaimers. Firstly, there will be spoilers for both Undertale and Harry Potter. If you want to avoid spoilers for the former especially, don't read. This is also something of an AU for both. And Chara will be a girl in this.

Secondly, there will be heavy annotations, as is usual for my works. You have been warned.

Thirdly, this is an M-Rated work. There will be coarse language, violence, and dark themes. Again, you have been warned.

Finally, the following is a fan-written work. Undertale and Harry Potter are the properties of their respective owners. Please support the official release. Otherwise, Chara will take your soul…