Is Undertale Sans from Deltarune's World? | Deltarune Theory Discussion

Is Sans from Undertale the same Sans as in Deltarune? This Deltarune theory has been floating around since 2018, and today I discuss its evidence, its holes, and why it's a neat idea, even if it doesn't come to pass.

0:00 - Intro
1:00 - Darkner? Post-Pacifist?
2:41 - Deltarune and Undertale Connections
6:58 - Flaws in the Theory
9:25 - MOTHER 3 SPOILERS: Implications on Deltarune's Ending
10:20 - Riverperson Other Observations
11:45 - Inverted Fate plug and Patreon Shoutouts

#Undertale #Deltarune #UndertaleSans #DeltaruneSans #SansDeltarune #SansUndertale #UndertaleTheory #DeltaruneTheory

[TheTSense]

"Sans is Sans" truly an Undertale Theory 4 years in the making

[matti.]

I dig the idea that while getting isekai'd sent Sans on an existential depression, Papyrus thought of it as great escapism. Maybe he saw the underground as a chance to start over, a real magical world where he could become a great and popular hero!

It fits given how, in Undertale, Papyrus is one of the few monsters that couldn't really care less about the surface.

[BKxNi]

It's really worth talking about the fact that not once so far in Deltarune has Sans said "Papyrus". Only "my brother".

[Kasssm]

Honestly, whilst there is Papyrus not knowing things he should if he came from a surface world, it could just boil down to the sole factor of losing his memory. Hell, we could also say Sans lost his memory as well, but managed to regain bits over time.

[radicaldreemurr]

I have a bit of an issue with Sans being from Deltarune, and that's Papyrus. You already went over Papyrus meeting a human in Undertale, but another thing is that he doesn't know what the sun looks like in Undertale until the pacifist ending. If the skeletons are from Deltarune, then how does Papyrus not know what the sun looks like? It makes him seem like a total idiot that doesn't know what basic fundamental objects look like. I guess amnesia could be a possibility but that feels unsatisfying

[Soda_B]

An interesting thing to note about Toby’s different rules statement is that sans can bleed supposedly, with Susie’s statement “everyone bleeds” this could be a better connection to this theory.

[dattos]

An obvious solution that im seeing pointed out in both the comments and on some tumblr blogs for the papyrus flaws in the otherworld sans theory, is that only sans is from another world, and Papyrus is indeed the papyrus from undertale, this not only solves the previously mentioned flaws, but also solves the whole Sans bleeding thing, where Papyrus does not bleed.

Besides, river person said beware the man from another world, not "men", its singular

[ChristopherMoom]

I can't believe you managed to go the whole video without saying "But hey, THAT'S just a theory!"

I guess something else that'd be interesting to bring up is Sans' Ice-E crossword; Ice-E is practically nonexistent outside of Sans' crossword puzzle in Undertale (His only appearance is specifically through Sans), but he's much more prevalent in DeltaRune, being the mascot of a pizza place (This point might be a bit iffy, but the Ice-E puzzle appealing to kids does line up pretty well with the whole pizza place thing)

Pretty great video overall, this topic's definitely an oldie, but I still enjoyed its analysis

[CrustyFox]

Well, my current interpretation is that Gaster is actually a Deltarune character that was foreshadowed in Undertale, and with his implied connection to the skelebros, maybe…

[Atomic_Dusky]

I'm really curious to know how Papyrus will be like in Deltarune because if your really think about it, the majority of what makes Papyrus' character revolves around the Underground. Sure maybe this core cheerful personality would be present as well as his funny quirks and insecurities but I wonder how he'll be like in the context of Deltarune. Like the only reason he wants to be in the Royal Guard is because he wants to be popular and make many friends, but there is no Royal Guard in Deltarune. The only reason he makes spaghetti (and other pasta dishes) is because Undyne didn't want him to join the guard because she thought his kindness would get him killed but she still wanted to help him and inspire him to do something else, but with no Royal Guard there is no making pasta for Papyrus. His battle body was made for a costume party and Papyrus uses it as his main "armor" to join the Guard, but with no Royal Guard there may not be no battle boy so Papyrus would be wearing normal clothes (or his cool dude outfit). Not to mention that with no Mettaton in deltarune (at least not the Mettaton we are familiar with) that means no MTT products that Papyrus uses. I'm just saying that Papyrus will not be the same Papyrus we all know and admire and love, either he'll probably be younger or, and let's pray it don't happen, he ends up like his concept design were he is a fedora wearing neckbeard with zero redeeming qualities (We all know Toby be reusing his old concept art like how Sans got his visor for the concept art when running the game spot from the Xbox version of undertale).

[snowflake_]

I'm gonna write this speculation ramble here before I forget, but basically I'm on board with the Deltarune timeloop theory, despite how tragic that theory might be, it holds some water mostly because of the talk of "fate" and our actions not mattering. Anyways, I think that at some point towards the end, some characters will catch on to the time loop and will try to make their escape to another world (Undertale) by building the machine we see in Sans's lab. However, only Sans and Papyrus make their escape at the last minute before the loop happens and they don't get out unscathed, their memories are mostly wiped. The only reason why they remember anything at all is because of the objects they brought over with them. I honestly think Sans's is the one who remembers the most, not because of any power, but because he seems to have more deep bonds and fond memories of his time in Deltarune while Papyrus was mostly a shut-in who will likely only meet Kris once or very few times. Sans's has already seen Kris twice, and it's not a stretch to say they'll meet again in the next chapters, so that could explain why he knows what a human looks like. It's also possible that Sans's really did forget Toriel's name, but knows's how she looks like (photo album perhaps?) and vaguely remembers her voice, hence why he connects with her so quickly and makes that promise with little hesitance. It's also possible, but a little dumb, that jumping worlds works similar to resetting in regards to how much memory a character can retain, and maybe they made the jump too soon without seeing the end fate of DR. That would probably prompt Sans (and Paps if he's the second one) to find a way to fix the machine and ultimately give up when proven impossible.

Papyrus is the one that feels like an odd piece to the puzzle, especially since I'm claiming that he remembers the least, but I don't think this infantilizes him. The thing is, he DOES remember, he just doesn't have many important ties to Deltarune that makes him miss his old home. In fact, I think he sees Undertale as a fresh start, somewhere he can finally go out and be friends with everyone, a magical place! I also think both brothers are keeping these memories to themselves, since there is a slight disconnect between the bros in the game (King Papyrus ending for ref). He also admitted to having nightmares (possibly the DR ending?) in the game and hints to being aware of resets, at least Frisk having "a power" to undo their actions. I know that some people suggest that Sans is the only one who jumped worlds and Papyrus is from Undertale, but the Snowdin Shopkeeper literally confirms that BOTH of them showed up so, that theory doesn't make sense (unless y'all wanna argure that her memories got altered somehow asldkfjlakdjf).

The only hole I see with this ramble is that, if they made this jump, then what happened to the original UT Sans and Paps? Did they literally just get replaced or swapped? Spoof out of existance?? Did they ever even exist XD I could ramble more but I think this is long enough- thoughts anyone?

[TheAdvertisement]

I've always had issues with this theory just because of how.. retcon-y it feels, and how many details don't line up with that in Undertale, like you pointed out. Obviously there's a ton of meta jokes around him in Deltarune, but it just didn't feel right to me. Not to mention, the narrator's meta jokes feel like a narrator, I'm a firm believer that Deltarune has no in-world narrator like Chara in Undertale.
One theory is do think could hold fruition though, is that perhaps both Sanses made a connection with each other. Think about it, the theme for Gaster - the goner maker guy who I'm 99% sure is Gaster - is called _ANOTHER_ HIM, while Gaster's theme in Undertale is called "him" in the files. If there's two Gasters, why not two Sanses? Maybe they saw each other once, for how long and if they even spoke we don't know, but that machine in Sans's lab still has a very unknown purpose. Perhaps that had something to do with it? Hell, maybe Gaster is the only one who actually figured out anything about Deltarune, and simply relayed some info from Sans! But this is all just speculation at this point, I do think we'd need more evidence to reach a sound conclusion.

[notTLWO]

what comes to mind for me is sans' line "Don't tell that to the other sans's" during his fight, it could just mean the sans's from other timelines, but it could also mean an entirely other sans.

[tylluanfathomless]

wow, there were a lot more point for the theory then i initially thought
i am kind of confused about papyrus though. if sans originated in deltarune and came to undertale, that would explain how he "showed up one day", but that also implies that papyrus came at the same time. and the gap between personalities in games is very weird. one thing we know for sure about papyrus's character is that he looks up to undyne very much and will do anything to capture a human to impress her. whats strange is he doesn't seem to be like that at all in deltarune. in deltarune, hes a shut in who doesn't see people often. i would accept something along the lines of he had a change in heart after he went to undertale and met undyne, and aspired to be like her, but in deltarune undyne is a very similar person. she still has the same personality and ideals, with the police instead of the royal guard. surely, he had heard or even met her before. which would either mean he had no clue of undynes existence in deltarune which means he even more of a shut in then we thought, something else is going on that is completely different then this theory, or, most horrifically, he never looked up to undyne. he wanted to enter the royal guard for his own reasons, and was putting up an act. this seems so impossible, so out of character for him, and saying that he just acts the way he is in all of undertale is crazy. but, remember who his brother is. his brother, who has knowledge of different worlds, the power to kill a human hundreds of times, who had perhaps know about a man who was scattered across time and space, and came off as a goof who knew nothing put pranks. perhaps, the biggest deception that he could possibly put up, the one he has been for all of undertale, was his brother. what if they were both like that, and papyrus has some other goals. and that concludes my stupid theory with a million plot holes that i came up with on the spot! thanks you, thank you.
wow
at first that was a question to myself and it evolved into an entire theory

[Klui_]

This is something I've been convinced of ever since chapter 2 dropped, and while there are definitely some set backs (Papyrus as a whole is the biggest detriment to the theory), I still feel it would explain so much of Sans' character, his dialog and actions, and I'm glad I got a video I can share with people that lays down the evidence in an organized manner, thank you very much!!

[Joost]

If we go by the Roaring Knight Papyrus theory, it's possible Papyrus will only meet Kris within the Dark World, and consequently not recognize them as a human but simply as another lightner.
Or, as trope-y as it is, Papyrus having forgotten about Deltarune via some amnesia could genuinely be a way of using the "Forgettable" line in a different way.
Alternatively, Undertale's Papyrus is just _really_ good at acting like he doesn't know things. He does seem allude to knowing about "endings" and that we can reset a couple times.

[deltajon]

When ever sans says “I’ve never seen you before” or whatever. He winks.

[MysticSlime]

Great video! This theory has been in the back of my mind for a while, and I'm glad to see more videos covering it.

My best guess is that the sans we see in Undertale IS from Deltarune's world somehow. It's the only thing that really makes sense to me, since sans says numerous times that he wants to go back somewhere, but that it isn't the surface either. I just can't think of any other places that aren't located in the underground or the surface in Undertale, which leads me to believe it has to be a different universe like Deltarune. Just my guess though, and we'll see more with more information.

As for Papyrus fitting into all this? Who knows LOL

[greenamber]

Some of the inconsistencies with Papyrus could be explained as Papyrus and Sans lying.

[MasterSquirrel]

Honestly, this is a theory I really do like, despite the couple of gaps. For a while I’ve been entertaining the idea of, as a bit of fan service (not that kind), that there’s going to be something of a subplot where Toby delves into Sans/the skele-bros’ origins, even if it doesn’t directly connect to the main Dark World plot. It certainly _seems_ like what he’s getting at, after adding the “Don’t Forget” note to Sans’ secret room. 

As for Paps, maybe _only_ Delta Sans was brought over, while Delta Papyrus wasn’t? Certainly dark, but… considering Undertale Sans’ outlook on his situation, I wouldn’t rule something like it out, personally. I can definitely agree that Deltarune being revealed as a traditional prequel would be a bit iffy by contrast, considering Deltarune is Toby’s longtime passion project, and how he wants people to view it separately from Undertale. 

And, yeah: Paps plain not showing up, or having amnesia in Undertale would both kind of be a cop-out, in my honest opinion (plus, the latter might raise unfortunate implications if his amnesiac personality is different from his “original” one).

Sidenote: The Papyrus Knight theory is actually another one I really like! Especially since it’s always come across to me that Papyrus was Toby’s favorite of the two bros, I feel like everyone’s favorite Fox has got something special planned for ol’ Paps. At this point, I might be buying Chapter 3-5 solely to see what the heck Paps turns out to be like! (Okay that’s a joke but still ;D)

-As for whether or not I’m hoping he has a fedora… that’s another story.-