Why does Sans bleed? - Undertale Theory 

First

I don’t know, why does he bleed? Don’t ask me, you are the theorist.

Guys guys here me out Sans is Mario -Sans is short like Mario Sans has blue eyes like Mario -They both have a tall pretty handsome looking brother -Sans and Mario’s names have A as the second letter Slam dunk theory, I know

I thought "ketchup theory" was just a bunch of ketchup bottles and tape. (Slashproof vest)

Reminder ya'll that Papyrus doesn't know what a sun is, yet he knows green grass

20:06 we aren’t the soul of determination, we are the soul of “ball game.”

some weird or extra points for certain theories because i felt like it: blood/bone marrow theory: - monsters are MOSTLY made of magic, not fully. so why can't they have biological blood on rare occasions? (could even be the same in deltarune, only some have it?) - it could also be that skeleton monsters simulate what a human skeleton would be, given the sheer resemblance (except for the skulls) so bone marrow and therefore blood would be simulated even if not needed. - hell, it could just also be magical just like the rest of him, fake blood, if you will. - as for why papyrus "doesn't bleed", it could just be hidden under his armour / not lit enough to see clearly under the armour. (battle body) determination theory: - given determination's connection to the color yellow, maybe his yellow eye is from that, with cyan for blue magic or something (idk, but i just thought it was neat). - sans doesn't act very determined indeed, maybe the whole reason he even tries fighting you at all is because of some extra DT he injected? ("forced" determination if you will) - DT might be red but the powers and magic behind it are yellow, thus the save point and such. (maybe even your HP is determination because its yellow, and it doesn't drop to zero when you "refuse"). - flowey probably has his determination in his roots, given that the roots absorb nutriens and water. (and thus maybe he was injected there?) - i believe we never made undyne bleed because she didn't have any outer/visible wounds throughout the entire fight, she just melts and seemed fine for the rest of it. (armour shade again for neutral kills and before her undying fight) even though people like toriel and papyrus get a bit of dialouge after they get killed, sans also just kinda walks it off for a bit before dying. like hes refusing to die just a little longer. ketchup theory: - it may have never been monster food at all, maybe just surface ketchup that got into the dump, or grillbs has a huge stash of it from god knows where. - he probably has set this up for a long time, just waiting for opportunity to use this as a prank and/or a guilt trip like mentioned here. - funny for the funny bone man. also- "SANS! WHY IS YOUR JACKET FULL OF KETCHUP STAINS?!" "its the new fashion trend, maybe you should ketch-up with the times."

I bet Sans wears an emergency bottle of ketchup in his shirt incase he gets hungry.

"sans has strong ties to gaster, and ketchup" *explodes and then goes to ad* best transition ever

Theres another problem with ketchup, which it comes out of his mouth. And it takes longer than the chest "blood". And his mouth never moves so its weird to say he *bites* down on it, but then again, he has to eat for energy. - But its kind of funny how the "blood" is such a mystery, Sans has so many ties to places that it could literally be so many things, but each thing has alot of flaws.

Sans could've met Alphys pretty easily. He seems to hangout throughout the entire underground in the game- though if you want to ignore that since he might just be following Frisk- he is confirmed to be a semi-regular comedian at MTT Resort, so not only would he go to Hotland often, but he also have potential ties to Mettaton and through him Alphys. I think that Sans probably does do science with Alphys, I just wanted to give a potential reason beside it

the brain rot of hearing the word "yellow" in an undertale analysis video is so insane lmfaoooo

He is just on his period probably, give my man some space

7:00 you also have to consider that this monster child probably learned about blood from their aformentioned mother, who (as an adult) would know what humans and monsters are made of. However, one thing that I noticed is that the child says "made of" blood. Humans do have a lot of blood in them, but it's only about 10%. Maybe monsters have some blood too, but they don't need as much to stay alive. So, the child would be saying "you have a lot more blood than we do, does it hurt?". As for lancer, I dunno. I think it really is just a throwaway joke, and Toby messed up.

Ketchup, is at least what I thought for a long time

Something you may want to take into account as to why people believe sans doesn’t die at the end of his fight isn’t just the end of battle sound that plays at the end that doesn’t only represent a monster’s death but rather the end of a fight. But what people should take into account is the number of kills you have before and after fighting sans that can appear in the entire menu thing you go to equip items and where your stats are located. After the end of the fight the number of monsters you have killed will remain the same. Also you could make the argument that LV increases the more you distance yourself from your soul rather than killing a monster, killing just makes it easier to distance yourself which is why our LOVE doesn’t increase each time we kill a monster but rather at certain times like how undyne gives us a load of LV or mettaton neo despite being a one hit. It’s more connected emotion wise rather than video game you leveled up mechanic. Sans said it best himself, EXP is execution points and LOV is Level of violence. Sorry for the rant just thought it could interest you, cool video btw

Guys? The "blueprints" in the secret room in Sans' and Papyrus' house looks exactly like Susie's and Lancer's table where Kris and Ralsei make the Trash Machine.

way off topic but is the canonical reason why random food can save you from the brink of death because of the “monster food converting into energy instantly” thing

17 times? Entry 17? either a coincidence or genius

Sans just pissed himself when you hit him

I feel like the logic at 0:43 doesn't quite make a whole lot of sense. The line specifically states that monsters are made of mostly magic, not entirely of magic (Alphys heavily implies that monsters have at least a little physicality in the true lab). Humans are made of mostly water, and they still have blood The actual makeup of monsters probably varies a lot between each monster, like how Snowdrake literally says that they're made of ice post true pacifist, or how ghosts are clearly made of something special cuz they can just go through stuff. Maybe some of 'em just have blood, and that's that

Just as a small counterargument against the "determination melts monsters" argument, I remember seeing someone on Twitter make the argument that we've never seen or heard of a monster injected with determination that wasn't already mortally wounded or close to death. Undyne had just been killed, then persisted after her death, so her body was obviously vulnerable. The monsters Alphys was experimenting on had already fallen down. And on top of that, Alphys says in entry 14 that the monsters she experimented seemed completely fine initially, meaning it would take a while before the melting would set in. Sans might've been injected very close to when the fight takes place, meaning he wouldn't have had the time or the preexisting life-threatening injuries to cause him to melt. Had he already been wounded, or had the determination in his system for longer, he might've melted. Obviously, I'm not bashing anyone who doesn't believe in the theory as it is kind of farfetched, but it isn't completely implausible.

I’m pretty partial to the monsters in Deltarune bleed theory, I mean he does mention blood ALOT. compared to say, Undertale in Deltarune. I think it would be more convincing if mentions of blood actually were colored red in game and then he could have kept the kids line white to show it’s unimportant.

The kid might be implying that monsters have a different type of blood, similar to how there are warm and cold blooded animals.

Bone marrow theory doesn't work because the marrow in the body of long bones isn't red marrow (hematopoietic tissue making blood cells), but actually yellow marrow (fat stores), and he gets slashed across the ribs meaning of his bones were cracked open and we saw marrow it would only be red towards the few places where the ends of bones were broken, and be colored closer to fat everywhere else

my main problem with Ketchup theory is that Sans coughs up the ketchup from inside his mouth and you can see it from inside his body. Just the logistics alone just make me dismiss it as a ridiculous theory. I think sans is really just from a different universe, just not from Deltarune. It would also be a Toby Fox move to tease us with the possibility that sans travelled from UT/DR or vice-versa just to mess with us.

As much as the ketchup theory is sort of logical,despite monster food being converted you could say he strapped it to his chest or something (but than why would it come from his mouth) or you could say he found ketchup from the dump so it’s human food,so it wouldn’t convert instantly (although far fetched) My gripe with it is that it doesn’t really…fit the theme of the Genoicde route? I mean it’s supposed to be dark and eerie,serious. The game literally,from what I recall in the code goes into “serious mode” in Geno. Sans having this dark moment where he bleeds and than Toby just going “oh yeah it’s funni ketchup to guilt trip lol” seems more comedic and doesn’t fit the theme of the Geno route. Also,human magic is connected to magical ITEMS,the monster books state that monsters themselves are MADE of magic and humans cannot express themselves with it,but they never said they couldn’t use it themselves. They pursumably could still use a wand or something to that extent,although it would probably take longer to master hence why they needed their 7 strongest to do it and because it is linked to a item they cannot express their “emotions” through it.

sans is ness

a fact against ketchup theory is the thing that he bleeds out of his motuh

if its of any relief, justice and determination's yellow slightly differ enough to tell them apart... sort of But anyways, deltarune separates them via the flowers in asgores flower shop, where there is both a golden and yellow flower

game theory : sans had one bottle of human ketchup he was saving just because its hard to find and for a special occasion, and since the world was literally ending, he though "might as well drink it now"

The ketchup theory has backups. Maybe he had a ketchup bottle in his shirt so he could possibly survive the blow. It makes sense since he tries to stop us no matter what, so if he survived he could trick us and caught us off guard.

only problem with ketchup theory is that some of the ketchup would be spewing out his mouth aswell unless he just storin it in his mouth or somen like a chipmunk the whole time and somehow still talking it seems like getting it to be in the mouth would be a way harder task than in his hoodie

ketchup was in his inventory🥶🥶🥶

It's not coincidentally, you only get the Don't forget flavor text if you talk to Clam Girl about Suzy. Monsters still turn into dust in Deltarune, they follow the same ritual of spreading a monster's dust on objects and burying them. And as you said, the rabbit kid confirms it. The Ice E person is a larper, he pretends to have blood like how he pretends he's a Warrior and that doctors are wizards. I don't understand what's confusing about Lancer knowing what blood is at all. Susie surely bleeds, she could be a special monster or a half human half monster. We don't know. Determination is gold, not yellow or red. The color used in text is yellow and it's used to highlight things in general. The anomaly Sans mentions is Flowey, not Frisk. ?? Colors are more important in UT/DR than they ever been in FNAF. The ketchup being the same color as his blood is a huge piece of evidence. Unexplained things aren't plot holes, plot holes are when things go against an established plot point. None of the things you mentioned are plot holes. *In conclusion:* it's ketchup.

Imma be honest, whenever I wonder why sans bleeds, I just say "there's not really an answer to this." At first, I thought it was like in Delta Traveler, where you become so strong to the point that you can now draw blood. The major gap in that idea though is that we kill not only Asgore, but also Flowey, yet they do not bleed. So now, I believe it's either Jaru's theory of "Sans is from Deltarune, but Papyrus is not", the theory that sans bleeds because the bones that were slashed have lots of blood, where papyrus' slash barely has any blood in comparison. (Very unlikely, since it implies there should've been SOME blood.), or it's a spare bottle of Ketchup sans was holding onto. Out of all of them, though, I think he did in face have a spare ketchup bottle, as it's very in-character for him.

Undertale: Random misaligned pixel in a random area Undertale fans: 30min theory video on why pixel is there

Here’s my theory. It says in that librarby book that monsters are mostly magic and humans mostly water. Not fully. Maybe sans is just less magic that the other monsters and more water, allowing for him to have some sort of blood. Think about it. He doesn’t have much health, he definitely seems out of shape as if he doesn’t have enough magic to support him, what with him sweating in his battle and him taking shortcuts instead of walking all the way to a place.

That one part in deltarune chapter 2 when Susie "twisted" her ankle and is bleeding, and it could be assumed that monsters have internal organs and whatnot, but they turn to dust and make the organs disappear with the rest of them; This would also make sense for helping with why sans bleeds, he probably just "bled" out. He could also be doing us dirty with some monster magic shenanigans though, wouldn't put it past him.

Sans's illusion magic comes in a multitude of instances. First is when he cloaks his entire body to make it black, which can possibly be extended to making his pupils invisible. Another possible instance of illusion magic is how the Grillby's restaurant appears to go completely still when he talks to Frisk about Papyrus and "the flower." That's about it

My counter to the “sans ketchup is just fucking with you to make you lose determination” is that he has no reaction to you reloading after killing him beyond “wow youre fucked up”

19:11 Another piece of evidence to counter this is that Flowey is able to remember through our resets because of their high amounts of dt, however sans uses "tricks" and facial recognition rather than actually remembering previous attempts. 20:20 Also for this part, I believe that the color for determination is white, as the amalgamations (which are basically liquid dt beings) are mostly white when viewed. Also, the attack patterns of enemies (which are white) tend to be smaller with less-determined enemies,and far more various and complex with bosses (it also connects blue and orange attacks as they are the only trait colors that the soul does not get turned into). Also the ketchup that sans drinks might be human ketchup, which reminds him from the past "world" he used to live in. My theory is that the underground might be a special dark world created by the original humans who trapped the monsters, in which the monsters may have evolved to live in there or something, deltarune takes place in a mostly monster island/town that doesn't have much communication with the human outside world, however the war never started and humans & monsters live peacefully (like a pacifist vs genocide ending to the war I guess). The only problem I found with this theory is that the ui in undertake and in the surface is the same, but maybe its cuz theyre both alone or smth? This theory explains why magic seems to be absent in deltarune and why monsters might bleed. Though tbh regarding sans I think the ketchup theory is the most likely.

actually there is another problem with the ketchup theory that I don’t think was mentioned, and that’s the fact that sans “bleeds” from his mouth as well as the wound we already ruled out the possibility of him having drank the ketchup due to how monster food works, so I don’t see how you could explain it coming from his mouth if he just covered himself with it or had it stashed in his jacket

sans the type of guy to hide 4 ketchup bottles in his jacket so it looks like he is bleeding so he can go off-screen and shake some dust off a nearby pillar then immediately go back to sleep

24:58 To be fair, the game has a LOT of red elements (red text, hp bar, Asgore's trident, character's sprites and more) and many aren't the default red. Plus, Sans is one of the few colored bosses, not only because of the "blood", but also his eye, which is very prominent. You would think the color of his "blood" would be more significant than if it was on any other character or another scenario that doesn't involve blood at all (especially when he even uses cyan/blue attacks, which are also color relevant. Sans is total can be related to cyan, blue, yellow and even red cause of ketchup, my man is a half rainbow!)

I think the last theory makes the most sense, even if the other one are pretty cool, Toby probably didn't think Undertale would get as popular as it did and was just making it for fun, I think it was also only him working on the game so it make sense why he didn't fix up every plot hole

While its not directly confirmed that monsters have blood in Deltarune, it does seem to be heavily implied that monsters are physically more similar to humans in Deltarune than in Undertale. In Undertale the main difference between humans and monsters is that monsters are made mostly of magic while humans are made mostly of physical matter. This leads to humans being able to hold more determination than monsters. The existence of special monster food that gets absorbed instead of digested like human food. Monsters turning to dust when killed. Etc. In Deltarune none of these things come up. Magic only exist in the dark world, meaning monsters cant be made from it. All Lightners are said to be capable of having determination. There is seemingly no difference between between human and monster food. And while we dont know wether or not monsters turn to dust, it hasnt been confirmed that they do either. But with Rudy and Berdly we may get an answer to that soon. Meaning they are also made of mostly physical matter in Deltarune, which would/could include blood. To me asking if monsters bleed in Deltarune would be like asking if they poop. They didnt in Undertale but the reason why they didnt doesnt exist in Deltarune so while it hasnt been confirmed, it can be very much assumed until proven otherwise. In my eyes, this makes the Sans is from Deltarune theory the most likely explanation. Not to mention all of the ties Sans has to Gaster and Gaster has to Deltarune.

To me something I always interpreted Sans' flicking between different bullet patterns as a way to show that this battle is going on way longer than it actually does in the fight.

My theory is that Sans saved ketchup on his jacket, like he cant live without ketchup, even in a fight, he just cant leave the ketchup, and he enjoys it, and...he brought one to battle

About papyrus green grass: maybe it is a reference to a kickstarter image where sans and papyrus are standing in a green grass. That would explain why paps were so nervous about it, like man, that must be a confusing memory. And also, in the pacifist route sans drinks the ketchup or it spill up all over the food at grilbys, but in genocide he never actually took you there, meaning that the bottle is still full inside his jacket

if sans is from deltarune and came with papyrus, then why doesnt papyrus bleed when he dies? considering that sans bleeds why doesnt papyrus?

1:20 Entierly possible they moved there from new home due to the crowding 1:38 Theres green grass in the underground, and lots of vegetation in asogre's home Itd make sense that the outside of his castle in new home would get lots of vegetation too after a while 5:50 It could be reffering to gaster I mean gaster being the one who crossed over isnt out of the question and may be more likely if anything I mean, its be pretty damn easy to become the royal scientist when your first achievement in that universe is well... coming over from another universe 6:46 Theres an alt version of the sprite with white blood in the files That sorts counteracts the red blood one to some degree if vith were made AND unused 12:48 Determination is more heavily associated with yellow and gold Thats what is highlighted with sometimes out of battle, flowey is a golden flower, the type from charas village, the save points are also yellow 15:07 Wrong, the anomaly is flowey. This is the case since if you do genocide as your first run, he still talks about anomalies in the space time continuum, and who might we think of that may have been reseting a lot? Flowey 16:05 No? If alphys made up the term then why would the narrator (whos probably chara) use it? 16:23 Durectly after killing undyne is when you see mettaton, so he couldnt have been involved, and allhys says in the hotland abourted geno ending that she had started evacuating people before undyne even fought you, which is why asgore didnt absourb the souls. Since alphys didnt watch the fight and see her lose. 23:58 Also possible since he was dying and all that he could actually see or hear papyrus in some way, like in a form of afterlife 24:15 Entierly possible sans was holding onto the ketchup, storing it in his jacket in case he absolutely needed it for some reason to heal (not unlikely fiven how long hes alive before he turns to dust) but the plan just sorta backfired on account of it being slashed into 2 27:06 Probably just meant cant do it on their own, they did have staffs and stuff 27:11 Never says that they get out of the barrier, more likely they walked for a while and starved to death, or got lost

Yellow is just a way of highlighting, many other texts and dialogues use it (especially the frogs). Determination is actually associated with the color red during the game, but this does not apply to the color of the soul because other humans who have different soul colors also had determination and the power to save the game. This is revealed in one of Toriel's first calls in which she strangely says that she already knows the other humans without ever having seen them before, indicating that the humans used save-points. And besides, although we actually hear the sound of a monster dying and we increase in level (love), Sans' death is not counted, as if his probable death didn't really matter in the game. And this really makes me think that he doesn't count as one of the deaths because he isn't from the world of Undertale and comes from Deltarune. Furthermore, I believe that the blood is really ketchup, as he always carries it on his coat, he even drinks it on our date at Grillby's and even offers us to put it on our food (although he spills too much and we can't really eat it).

I think there's a much simpler answer than we're all making it out to be. Monsters could just have their own type of magic blood. We only see Sans bleed for emphasis' sake. I mean, we see several monsters sweat & cry. Why would blood be an exception?

I just found your channel with this video, and honestly I can really appreciate how you explain a lot of evidence but then also ramble on about your feelings and opinions. This was a very fun video to watch. I feel like if Sans and Papyrus are from Deltarune then it can't be an alternate universe to Undertale, because we didn't see their Undertale counterparts and i doubt that would be kept from us. Not everyone in Deltarune has an Undertale counterpart, but the major players from Undertale are all in Deltarune. Toriel, Asgore, Asriel, Undyne, Alphys, Mettaton, etc etc.

Mettaton, singing: “And then you’ll die A LOT.” “A lot”, being the key word. Coincidence? eh, maybe.

I’m not too deep into Undertale theories but IMO, the Deltarune theory makes the most sense. Like, Sans is hinted so much to be something else, it’s difficult to ignore.

toby for the love of god release chapter 3 they're talking about sans bleeding again

15:59 very very interesting

I like how there is literally a failed attempt at creating a time machine in snowdin made by sans

In regards to the "illusion magic" theory, Sans kinda does warp time and space. He'll go in the opposite direction and end up in the room that you're headed. He also knows some shortcuts that don't exist. So, maybe not illusion as it is alteration but I think it could be some food for thought.

I always thought that up until the Sans fight, your weapons weren't really "weapons" - they were more improvised weapons or magic-based (like the Toy Knife and Empty Gun) while by the Sans fight, you'd have the Real Knife in your posession and with the incredibly high damage output it has on its stats (and Toby probably assumed you'd be fighting with it) so with a _real_ weapon in posession, the attack on Sans actually _did_ do such a tremendous amount of damage that it'd cause one to begin bleeding.

The melting for the amalgamations happened quite a while, or at least a day, after they were injected. That can be suspected by the fact that the melting was written in a separate entry

The only reason I don't like Ketchup Theory is because despite how strong fans make the connection seem, the only interaction with Ketchup that Sans has is when he's pranking Frisk. Depending on whether you say yes or no to the ketchup he either dumps it on your food or drinks it. As for him working with ketchup, that's only referenced once and it's mentioned alongside relish and I think mustard to set up that he actually uses his lookout stands as hotdog stands. Now granted, a connection is a connection. So I won't say the theory is impossible, it just implies that Sans has a larger connection to ketchup than he does and it reminds me of the early days where everyone acted like he had a ketchup addiction.

The theory with the determination Injection is impossible if we assume this determination gave him his abilities. In Snowdin Sans warns you and then teleports. I doubt he would inject himself with determination unless he was 100% sure he would need to fight you.

I love plot hole theory, toby fox made asriel fly because he "looked like a dork just standing there"

Sans having an emergency bottle of ketchup in his rib-cage works, in my opinion.

I like to imagine that Toby specifically made Sans drink ketchup in the pacifist run(showing us that he does that often) so he bleeds ketchup at the end of the genocide run to bring us guilt one of Toby's main reasons for making undertale was to make players feel bad for killing after all

I always heard that the ketchup theory was true but with a small change, he just had a bottle of ketchup on him because he loves ketchup and we just hit the bottle by accident (though him knowing where we always hits and choosing that spot would be cool

Solid video, and I'd like to add some anecdotes to details that I found challenging: - The books state that humans don't know the joys of self-expression through magic, not explicitly that they can't use magic altogether. - It's not clear whether Frisk crossed the barrier in neutral. All that is seen is them at the last room in the game. Some theorize that the reason why we don't see a cutscene of them on the surface like the pacifist ending or why they don't pick up their calls is because they failed to make it through the barrier, and passed or was trapped in the process. Some other hypotheses state that the power of the human souls may have allowed Frisk a single passage outside the barrier. If neither the neutral ending or the books are plot holes, it would make Sans' blood a very large and lonely plot hole. - Sans being from Deltarune (predicated on the presumption that monsters do have blood) would be strange considering that, if Papyrus was also from DR, he would be the only DR monster with a confirmable lack of blood contrasting Sans' presence of blood. It is plausible that there's variance in the presence of blood in monsters from DR, since I can't fathom how a fire monster like the one in the Hometown diner would ever contain blood. You did a good job covering the leading theories. It's fun seeing how people continue to develop the story of the game's world almost a decade later.

It's kind of more understandable that deltarune monsters have blood since it seems like they are stronger than those in Undertale and more resilient with determination like Susie is a very strong monster and even stronger than Kris, which shouldn't be the case normally but she is and the magic of these monsters is quite impressive and some can open the dark

27:03 NATURALLY they can't', at least. In the intro, the wizard has a scepter!

when sans asks papyrus what he wants to get at grillby's hes probably just talking to papyrus' skull maybe its still alive

Along with the save points, Flowey, and text mentioning Determination being yellow, it's also notable that your health is actually represented by a yellow bar

Because of the pacifist ending, we can speculate that being able to “come back” is only possible for the entity with the most determination, since flowey didn’t come back either.

27:16 *ONE.* The one you're showing on screen. Which is why I assumed Alphys was lying before I entered the wider Undertale fandom.

25:40 . As you mentioned the biggest flow is indeed that monster food conversts into instant energy. But this is a bigger flow than you might realize since ketchup comes out from his mouth. If ketchup actually entered his mouth it would have converted into magic. Also in 21:30. I believe that Sans died but you didn't do justice to the theory that states he didn't die . The reason people are saying that except that you don't see him turn into dust it's because your kill counter doesn't increase. Which is a big problem . Now I believe that Toby forgot to code it since after Sans you meet Asgore and you don't have a chance to see your stats again but then it raises the question why hasn't Toby changed it after all these years.

and hes drink in one trailer of undertale and the ketchup goes through it

1. We don't know whether injected determination melts a monster immediately. Maybe it takes some hours, or some days. After all, the True Lab reports initially reported on the injection subjects as being completely fine. They didn't IMMEDIATELY melt. 2. It is possible that determination only causes immortality when the fusage of mutliple monster souls into one body occurs. After all, Undyne melts AND dies. 3. People have theorized that Sans' "papyrus, do you want anything" is him hallucinating that he's seeing Papyrus in the afterlife (because of just how out-of-it he is).

Sans put ketchup bottles in his jacket and a ketchup packet in his mouth

I'm pretty sure the humans can't use magic thingy means that they CAN'T use magic without some sort of magical weapon unlike monsters that can use magic only from their own bodies but in the intro it looks like that dude is welding some kind of weapon idfk

2:50 be careful, you are going awfully close to Sans is Ness

Thinking about it Maybe "Toby thinks it's dramatic" isn't far off Maybe it's something more powerful It's a metaphor of some kind? Like how in Puss in Boots 2, Puss bleeds in a kid's movie. Sans is the only monster to bleed; whether it's possible for a monster to do so or not, we're bound to interpret the blood more powerfully as guilt than dust. Because dust, whilst still guilt-inducing, would be more cathartic and like "I've done it" rather than "what have I done?" The sudden inclusion of blood humanises the characters in a similar way to their character arcs. However, whilst the character arcs in general are to make you form bonds with the monsters, their positive arcs during Genocide use those human-to-monster bonds to continuously add more and more powerful negative emotions throughout the run. It could be a stretch, but given Undertale is more of a eudaimonic game in my experience; where after Pacifist I just could NOT bring myself to kill anyone, I think some kind of guilt-inducing metaphor or underlying meaning is part of what Toby intended. I'm not entirely sure how to word that better, sorry. EDIT: Hey sorry, I'm back Maybe the blood is both a metaphor on guilt and of murder. As murder is essentially needless bloodshed. As well as this, the inclusion - and only inclusion - of monster blood is a shock tactic similar to the one in Puss in Boots 2 to catch the player off-guard.

I've always thought he had a bottle of ketchup stored inside his jacket.

27:03 it says that humans can't express themselves with magic. it doesn't say humans can't use magic. human magic does not have the individuality and art of monster magic.

Only undertale fans can make theory about red pixels

I honestly think its more likely the child who asks about you being made of blood is a writing mistake rather than every other mention of blood, Toby forgor this is Deltarune now and wrote a minor NPC line like it's still Undertale. He never made alluded to monsters having blood in Undertale so i don't he would start making so many mistakes about it in Deltarune, one Undertale line slipping through to Deltarune seems more likely.

if sans is trying to guilt trip us, i think he could have just taped ketchup packets to himself to make it more "dramatic". (or he just had ketchup packets in his jacket pocket and we sliced it)

He bleeds simply because he feels like it

I just found your channel today and already binged every theory video you've made lmao, your editing is great👌

Loved listening to you explore all these. Great vid!

Sans discourse have been going hot for nine years, like, this lazy bone can fit so many plot holes in him. Honestly I think Toby is just trying to figure it out himself, lmao. I mean, sans clearly has a connection to gaster (very clearly defined character) because of the gaster blaster (mainly) but the chronology of gaster being a royal scientist doesn’t match with the supposed age(?) of sans or what we know of him since “arriving” to snowdin. Sans BLEEDS?!?! while papyrus doesn’t, we don’t know what papyrus special attack is (the reveal would be huge and could potentially reveal many things about the lore), papyrus himself doesn’t seem to know a whole lot about sans because “sans never tells anyone anything!”, sans can manipulate space and time(???) and nobody seems to question it, it is just like that (although it is more like nobody can explain it, so we just gave up). A better question would be WHAT DO WE KNOW ABOUT SANS AND PAPYRUS?!?! my response would be “two skeleton brothers that reside in snowdin, insert papyrus lore, insert sans lore” but people are even questioning if sans is actually a skeleton (very justifiably so, but still).

I don't think Sans was string because of liquid determination. Because he shows to have some of the same abilities long before your fight with him. And he says he would have killed you where you stood if it weren't for his promise to Toriel. Which shows that he has the ability to kill you even early on in the game.

I think the determination theory is different, I think that sans during the fight gets so determined he starts bleeding determination.

I figured he had ketchup stored in his ribcage for drinking whenever he wants it. Takes it out and drinks it whenever he wants, big slash cutting into him shattering the packets/bottles and causing him to """bleed""".

Determination is the ONLY thing that can be in colour during fights (so all colours except black and white maybe ...) are all (at least in fights) determination :)

It's weird that sans doesnt just teleport outside the mountain I mean he CAN

Man this game is 8 years old and people still are questioning if sans has blood or not.

9:05 the tell of a good intellectual narrative writer isn't how little they retcon but how well they fit loose ends into the current story.

The thing with ketchup theory and it not converting to energy is a bit weird though. Sure Sans is a monster, but he's also a *skeleton monster.* Where would the ketchup (or any food really) go to be converted into energy? He's an undead monster, which excluding the ghosts, are the only ones in the entire Underground. Additionally, even Napstablook presumably doesn't eat regular monster food, since he has ghost food in his fridge, implying he also wouldn't be able to convert regular food into energy. Thus, Sans' ketchup just kinda... Sits there in his jacket. I don't recall where it was shown exactly, but there was a sprite of Sans drinking some sort of milkshake or other while laying on a chair, and the liquid did end up seeping out from underneath him too.