DELTARUNE: Inverted Soul Theory 

It's not just about soul order in Deltarune being inverse to Undertale: Deltarune's darkworlds (based on the two chapters we have) are an inverse to Undertale's progression. Think about it, the 1st darkworld of Deltarune we see has a castle near the end, and we fight a king. Just like in Undertale near the end of the game, we go through a castle to fight a king(which is Asgore). Deltarune's 2nd darkworld is a cyber themed one, with some areas sharing similarities with the Core and the area around MTT hotel. We already know that Spamton Neo is very much connected to Mettaton Neo, but even Queen shares some similar features to Mettaton EX. And so far what we know about Chapter 3, it will be based on entertainment. Some of the assets we seen of Chapter 3 are very reminiscent of some of the stage areas Mettaton uses in Hotland. My guess that other parts of Chapter 3's darkworld will be based off of Hotland. So, instead of Undertale's progression of leaving the Ruins and going to Asgore's castle, we're going in reverse order... very interesting indeed...

I don't think Chapter 4 will be a light world chapter. Toby Fox has said that Chapter 3 is going to be a weird chapter and that Chapter 4 will be more typical.

"Everything Toby does can be a hint" Toby:"He looked like a dofus standing there so I amde him fly"

I didn't realize there were songs in both chapters that are starting to spell Gaster's name out. That is a very big hint tbh

This is a fun theory, but I have one added idea: In almost every instance of seeing souls in Undertale, it always seems like there's a missing one. There are 6/7 souls in captivity, and one empty space. Flowey, in control of 6 souls, still remains soulless. Heck, even in the spring newsletter, there's flowey, a soulless flower, at the end of the chain. Not to mention, the ACTUAL first soul is gone. The eighth chapter won't have the sky blue soul. It won't have a soul at all. The Eighth chapter will be the Soulless chapter.

If the inverted soul theory is correct, then I'm excited for chapter 6 & 7. New mechanics!!!!

In terms of whether or not chapter 4 will have a darkworld. I'm like 99% confident it will. The newest newsletter talked about fights and bullet patterns for chapter 4. So unless we get into fights in the light world (highly doubt it but who knows) we're getting a fourth dark world.

Hold up, let him cook. 2 chapters in and we're already cracking the whole game?

I think Chapter 6 is going to be BOTH Cyan and Orange. It’d be weird if the final chapter had a secret boss, when the FINAL Boss is supposedly there. So maybe it’ll be a double battle with the Orange and Blue attacks!

Its inverted order of human Items we find too! Red(Locket&Dagger) Yellow(Hat&Gun) Green(Apron&Pan) Purple(Glasses&Notebook) Blue(Tutu&Ballet Shoes) Orange(Bandana&Glove) Cyan(Ribbon&Toy Knife)

Red - tutorial, nothing special. Yellow - Justice. Introduces consequences to your actions (Sbowgrav)

Interesting theory but I do have a few points I’d like to just discuss One, chapter 4 will almost definitely have a dark world. Toby mentioned it being a more regular chapter and the fact it is raining at one point implies a time skip. If I had to guess, we’ll enter the dark world while it’s raining then it will be sunny once we close the fountain (since that’d be funny since water fountain). Two, I personally think purple will come before green. Undyne had spears in Undertale to give but she has no reason to give us a spear in Deltarune. Also, Kris opens the fountain no matter if you talk to seam or not so they wouldn’t have let Undyne in the dark world for that reason. I personally think, when mentioning the “next” boss, he was talking about the next bods he thought we’d face. He might not have known that Kris, since he seems to know more about the knight, would make a fountain which could mean we find the shadow mantle in chapter 3. While this does rely on the fact that Kris isn’t the knight, I think it makes sense Anyway, still really enjoyed the video so good job and sorry for the rant

There's one problem with the beginning. Kris wouldn't know they need a shield for a boss, and even if they did, they wouldn't know if Undyne would be that person to give a shield.

I think, if you defeat all the secret bosses (Jevil, Spamton, etc.) and collect all the Shadow Mantles, you will get the secret 8th chapter

Joy is me, what a fantastic video!

AYYYYYY I HEADCANNON THIS THEORY!!! ITS REALLY COOL!!!

6:04 gonna sound like a colour nerd here but I believe the name of orange's complimentary colour is azure

Love this theory! Using Seam’s warning as evidence was so clever!

@1:47-.-But Kris opens the door even if you don't find any secret bosses. Keep in mind the secret bosses are optional, so the story has to make sense if you don't fight them. I'm not saying it's impossible for Undyne giving us some kind of item that will help us fight the secret boss is impossible, but it makes no sense for that to be the specific reason for why Kris opened the door, since they'll do that even if we don't fight any secret bosses, and doing so would make no sense if we don't end up fighting the secret boss.

Oh my god i realised something watching this video: In asgore's flower shop, the colours of the flowers face the opposite sides of eachother. Purple faces green, blue faces orange, cyan faces yellow. Maybe thats the order of opposites we have. But do you know what else is there? A golden flower in the middle. And in the newsletter, what do we see after the four flowers in a row? Flowey. Every time the flowers appear they are in the same order, yes, but he is always at the end. I believe your 8th chapter + 8th soul theory, with one minor tweak. We won't play as a blue soul, we'll play as golden. Now to be fair we are probably about 10 years away from seeing the end of this game so I have no idea how flowey is going to tie into everything, but i know for a fact that he is going to have some involvement. And this just proves that point. Great video btw, this theory is amazing 💖💖

So far each boss also mirrors the reversed No Mercy route in UT, but the fact that the shadow mantle is needed for the chapter 3 boss makes me think that it'll indeed be a green soul battle.

I love the theory and it does answer a lot of questions, but I think the red soul doesn’t have a match cause it’s Our/Kris’s soul

I think the soul power of red is to save load and reset or it is determination because if the other souls had that they would still be alive but maybe if you have 6 souls you can load and save or if you have no soul

I really like this theory! It does have a lot of proof to it, and it has some neat connections to it. I like the idea that we will be facing new soul colors in the last few chapters. My idea is that with the orange soul, you'll have to hit the white attacks to not get hurt, and you want to avoid the green attacks. And the cyan soul can't move, but you can move something else to push it away.

Calling it right now: now that I’ve watched a single deltarune theory video, my suggestions will be nothing but.

Up there with Clock Hand theory as something very superfluous but still very compelling.

The very fact that in the news letter, after the four flowers denoting the colors of souls, there is a Flowеy analogy for chapter 8. And in general, the game files seem to have been up to chapter 9

Orange and navy blue. I've seen a song interpretationg of Gaster being a pirate. If gaster is the knight. He surely is a navy blue soul. He went sailing across time and space, being everywhere for his own gain and nowhere to be catched. Like a pirate!

YES THANK GOD I'VE BEEN THINKING ABOUT THAT SOUL ORDER THING FOR SO LONG LOL (Edit: buuut I just realised i think of it more like in boss order: e.g: Jevil - Red | Red - Asgore Spamton NEO - Yellow | MTT EX - Yellow Secret Boss 3 - hypothetically Purple | Muffet - Purple SB4 - Hypothetically Green | Undyne - Green SB5 - Hypothetically Blue | Papyrus - Blue SB6 & SB7 - Hypothetically orange and cyan in some order- could be in other places as well.)

It's even crazier when you realize in underlabs theory about the human souls becoming monsters the orange soul is theorized to be gaster

I honestly think Deltarune's dark worlds will mirror Undertale in reverse. Chapter 1: The Card Kingdom, mirrors New Home, it is a kingdom whose king is set on the freedom of his race Chapter 2: The Cyber World, mirrors Core, since it is made of technology and features a hot robot and the NEO armor Chapter 3: The TV/Living room world, this mirrors Hotland since it would likely represent a combination of normal terrain and technology (though the green soul fight does not occur here, except maybe when Undyne chases you into it at the end of her fight? It could use the purple soul instead) Chapter 4: The Church world (since Rudy says he would try to go to church on Sunday, and Chapter 3 I think takes place Saturday night), mirrors Waterfall. This is where we meet Gerson and learn about the Angel in Undertale, while in Deltarune, Alvin is the head of the church that worships the Angel. Chapter 5: This one I'm not sure about, but if it mirrors Snowdin it would probably have to do with Sans and Papyrus, the Holiday family, or ICE-E. I believe in the Papyrus Knight theory, and if we use chess theory here this would also be the Knight chapter. The blue soul does occur in Snowdin, so this would fit. Other than that I'm not sure. Chapter 6: My theory is that this will be the Gaster chapter and take place in the bunker, which would be parallel to the Ruins. It would likely be a more treacherous dark world that Gaster has to guide you through like Toriel guides you through Undertale. I should also note that this could include both the Orange and Cyan souls, since Gaster was shown to be adept with both color's powers when building the CORE defenses and the two seem more like counterparts to each other (keep moving vs. don't move) Chapter 7: This would mirror the Surface and include a fight against the Angel, since Gerson says the Angel will come from the surface in Undertale. This could possibly include the Roaring and the dark and light world becoming one.

tbf you are cooking

. The Dark Blue soul means Integrity, so Spamton being the opposite of that makes perfect sense. . The Purple soul means Perseverance, so Chapter 3's secret boss will probably have a procrastinative/laid-back personality. . The Green soul means Kindness, so Chapter 4's secret boss will most likely have an uncouth/angry personality, akin to the Mad Dummy . The Yellow soul means Justice, so Chapter 5's secret boss will speculatively be an evil/corrupt character. . The Light Blue soul means Patience, so Chapter 6's secret boss is admittedly quite hard to speculate. . The Orange soul means Bravery, so Chapter 7's secret boss will be a character revolved around cowardice. This is could easily be proven wrong as soon as the next two chapters come out, so don't take my word for it.

bro is cooking like game theory you're giving me chills the same way matpat used to man

bro really cooked hard especially now with the debug icons

one of the best theories i've ever heard about Deltarune

that's interesting. and it could maybe tell us more about what the soul power of red is, if it has one at all.

The theory goes hard but the part about opposites shows what years without an update does to a man

I don't know how this plays into the theory, but the colors of the souls also align with the colors of our heroes and their personalities. Susie is purple and represents perseverance, Ralsei is green and represents kindness, and Kris is a shade of blue that may align with the hidden navy blue you mentioned in the video. In some secret chapter, the final boss may be Kris himself, with his true soul (the navy blue one) fighting against the player's soul (the red one).

For the record, a mantle is an article of clothing that's kind of like a poncho, but only goes down to the elbows at most. They're kind of too ponchos what skirts are to dresses, or shorts are to pants. One could still imagine it being intended to act as a shield in green mode, but I think it's important to point this out.

Omg, this is actually a really good theory for Deltarune. I actually believe that this will happen

Wait this is actually genius I didn’t even think of that

I always liked the thought of the sky blue soul as a soul of "calmness". It is almost the opposite of bravery and it fits in blue colored souls as well!

Sky blue - skies forever blue

orange and navy blue are literally papyrus and sans

2:00 given how kris does this no matter if you even do the secret boss or talk to seam this is most likely not the case.also how does kris know that undyne is the key to the shadow mantle

2:18 quite unlikely considering the fact the order literally means nothing. For all we know the 4th secret boss could use cyan.

Since we're having some fun overthinking little details, I wanna give my own idea too Alternatively, I think Red might be the one without a pair. It's made clear Red has always been distinct from the rest. If you want to look into it further, the other souls have pairings too. Cyan and Orange are both given attack gimmicks instead of altering our soul, Blue and Purple are found in Waterfall, and while this one is much looser, Green and Yellow are both found in Hotland to a certain extent as well as both weapons having four hit reticles when used. Take it further to Your Best Nightmare. In the OST, the soul themes are not only put into pairs of two but are in the exact same pair order I give out. The only conclusion I could draw from this is that Red's pairing might be... Red. We often brush off the fact that Chara and Frisk are both red souls, but I feel like we could draw up some point that there *isn't* a different color to pair with red and that is will always circle back to itself. Two red souls fell into the underground, so it would only be right to consider both when theory crafting. The fact Flowey constantly compares Frisk to Chara also helps reinforce this idea. Determination, Power, Ball Game-- whatever you want to define red, it seems to always be an exception. But what does that mean for Chapter 1? Well, I'm not entirely sure. But it's something I want to share my thoughts on and see if other people can see where I'm thinking with this. Perhaps that second red might refer to us and our discarded vessel. We might become the final opponent, at least to Kris. Because really, who's the one in control?

Wow this theory is spectacular, and I appreciate this level of quality in under 10 mins! Not every good theory needs to take several hours to cover lol

If the soul colors were *actually* related to Undertale's fallen humans, "the secret chapter" would probably be associated with the red soul as Chara has a determination soul.

You're spitting bars ngl

my predictions in the future bosses: also i wanna point out that every chapter will have a secret boss that uses one special gimmick special soul c1: Jevil RED c2: spamton/spamton neo YELLOW c3: Undyne GREEN also c3 will happen in a tv world which is confirmed c4: we didnt see mettaton who used the yellow soul before c2 was released and we got spamton a dif version of mettaton so i predict that c4 will have a different version of muppet c4 probably will mostly be in the overworld c5: either sans or papyrus that may be crazy but i have an idea of what c5 will be: paparus will be the knight or just a main boss and sans will be a secret boss (i hope atleast) we got hints that we will see paparus soon thats what sans said and he had history of being a knight before but i have no idea where c5 will happen c6: is so far in time its useless to speculate but if toby continues with this pattern there will be a secret boss that uses the orange soul gimmick which is unknown only some fangames used either the "always move" gimmick but its unofficial so the gimmick may be completely different c7: may or may not be released before 2030 at this point so its dumb to speculate that far but we will get a secret boss that will use the cyan soul gimmick i have a theory that since its an inversion of the red soul cyan soul will be red soul but with inverted controls but that is just a theory a game theory

1:35 This may suggest its not the krder of fallen humans but the reverse order of the souls used, in which case next chapter will be the purple soul as that comes after unyne but befire mettaton 2:00 how would kris know undyne can provide a method of blocking?

7:06 Unless my eyes have completely failed me, I'm pretty sure those two hex codes both read "#ECFE0F" Aside from that, very interesting theory! The idea of Deltarune's soul order being inverted from Deltarune's is interesting, although i feel like a sample size of two secret boss fights is a little early to be making the call that there's a specific order of souls in mind.

There's not much to suggest this, but with red and orange being so similiar, maybe it has some connection with theories that talk about the indended recipient of our control? That is, we were meant to control the vessel, but ended up with Kris and the vessel is now under Gaster's or someone else's control.

Orange Left partnerless Hmmm Flowey Just maybe we'll play as Asriel Or A souless charater

Personally i don't think that an 8 soul color would happened, instead I'd think after cyan it would loop back to red. After all technically, chara had a red soul, and if we go by that logic undertales soul order would go red, cyan, orange, blue, purple, orange, yellow, red. So by that logic theirs already 8 souls. Also orange goes before the final chapter, meaning story structure wise, that's when everything goes to shit, Like the roaring. But if I we're to follow your logic, I'd believe that you're sky soul would be dlc or a hidden ending or path unlocked by doing either snowgrave-esk routes, the eggs, or finding the secret bosses. But with the songs, spelling WD.Gaster I'd think that the final bosses track could fit that mold, or some form of bonus content after completing the game, like the doorway at the edge of town, or dlc as previously mentioned. Anyways, good video, sorry if this comment just comes of as rude or a monotonous block of text. Have a great day.

this is a much more shallow comment in comparison to your analysis, but Orange and Cyan souls being the last 2 souls intrigues me even further considering that they are the only ones we have not used in Undertale or Deltarune at all

this makes sense i've heard other theories about a chapter 0, that might be your "8th" chapter you should definitely look into it if you want to solidify this theory

If this is true then maybe we will finally know how the cyan soul works Orange is kinda obvious you gotta move 24/7 Unless toby makes the mechanic something different

I LOVE THIS IDEA IT MAKES ME SO HYPE FOR THE NEXT CHAPTERSS

I think there might be a secret 8th chapter, since next to the newsletter flowers, there was also flowey, who seemed to stand out

the orange soul aka bravery has no partner because it alone its bravery is enough to withstand

now that i think about it, sans tells Kris he already befriended Toriel, so she could just, "Hey Kris, I met a new monster, named sans", that's why Kris can say, "Hey, sans"

Good theory. It's simple, but interesting, original, possible and fits with the narrative.

toby watching this video watching you completely overthink this and just wanting to use some random colours

i think the orange soul will likely be the representative of the overworld chapter, as you mentioned the light world uses alot of oranges and greens, and since orange is the only one without a partner i would assume thats the outlier chapter thats purely in the overworld

If deltarune is an inverted world doesn't that mean humans are the ones trapped underground

>Sky blue as in... Skies Forever Blue?

This is wild to me, because I've long had the crazy theory that Kris, with their color scheme and personality, fits somewhere right between cyan patience and blue integrity. They're clearly focused on protecting their sense of self, but patient in dealing with it. A secret chapter with that exact in between color makes me Wonder.

NOT THE ECHOES OF THE EYE SOUNDTRACK 2:50

6:32 in the file, there's a title card for chapter 0. Maybe that's the last letter

wait you’re extremely good at doing videos like this please become our next matpat

In Undertale yellow, the blue soul and the yellow soul are brought together, in Undertale musical blue and yellow are brought together and now similarly here and in Deltarune

Can't wait to see what the cyan and orange soul are if they appear

This is some of the most insane brain-rotted theorizing and I love it

If there was a sky blue color, would it be a trait like, I don’t know.. Humility? Maybe something like Dedication? Loyalty? Hope? I’m not sure.

I always thought that Kris/Frisk's original Soul is Patience but our Will/Determination to this world make their soul into Red previously the only type of connection i had for that was Kris' color palette in the Dark world, Frisk being called Kris in a newsletter code, the fact that in certain part of Undertale CORE there's a hidden third part in which requires to be patient and the Switch Soul in the Nintendo Switch version. but with this theory of the inverted souls, i think it adds something on that other theory. consindering that Cyan and Red are their counterparts.

its heavily theorized that Kris's natural soul colour is cyan so having the red and cyan inversion would fit perfectly with the whole player and Kris dynamic

Just an FYI the order that you listed to souls falling in is 100% just a theory based on the order you find the weapons and armor in undertale. That could be equally likely to be the places they died or just completely random. Overall I like this theory (not the first time ive heard it but I do like it) and also generally subscribe to the idea. That being said i think it is a bit misleading that you assume thats the order the human dies without mentioning its just a theory. (Im wrighting this comment early into the video and will edit if i made any wrong assumptions) Edit: Just finished the video, absolutely excellently done, you have definitely earned a sub. I would just make sure to keep in mind the previous things i said. Also I doubt we will have an 8th chapter but if we do I doubly doubt we will have a 3rd blue soul lol, especially considering I think we were only supposed to have 6 souls to start with in undertale. (If you reply I would love to elaborate on that claim)

I was thinking the order of each soul color throughout the chapters were just the reversed order you get the items associated to the soul colors in undertale

I believe it was never fully confirmed that this was the orders in which the human child fell in UT, but it is an interesting coincidence

I never would've thought of this, amazing theory! But, for me it's a bit of a shame these soul types would only be used for the secret bosses, and not be that important in other parts of the game. But who knows? Maybe Toby changes his mind and makes it appear in other bosses too.

5:41 most relatable part about undertale/deltarune

"There won't be a dark world in chapter 4" Then how the heck are we getting a secret boss with the purple soul, huh???

Our fandom is so cooked we’re making theories like this 2 chapters in

I also recommend watching half bread chaos’ episode about elements if you want to know about the shadow mantle

also on the note of the newsletters, it goes with all the last unfinished chapters, and then flowey, do you think the 8th chapter might only exist if you've played and beaten undertale? some games have cross game references and featues, they're usually much smaller than a whole new segment of a game, but I could see a world where a secret final chapter unlocks if you have beaten undertale on your device

2:28 bro from where orange went XD

this definitely supports my chapter 5 papyrus house theory

To back up the speculation/theory, If the Last 4 soul colors / Hypothetical last 4 chapter colors are accurate, then wouldn't Flowey being part of that lineup suggest that 8th chapter? (And also, to connect Deltarune + Undertale together even though they narratively aren't connected, could that suggest that Flowey/Asriel's 4th wall breaking powers were potentially unlocked by the same source as the Deltarune secret bosses? Like, how do you make the jump from "I can use the power of determination to "SAVE" and Turn back time for myself, making all these interactions *feel* like a video game where I'm trying to scrape out every piece of content" to going "oh my god I'm in a video game" and speaking directly to the player?)

this is likely coincidental, but when you said the opposite of orange is “sky blue” it sounds somewhat similar to Toby’s other game, skies forever blue. (The irl version of dragon blazers, nollelle s game. Not sure what this could mean, however. Additionally, spamton had a dialogue predicting the location of the next chapters in the spamton NEO fight. I don’t remember the exact dialogue, but the next chapters should take place in room with a TV chapter 4 in a room with a canvas room, perhaps an abandoned art room? This makes it unlikely for a light world chapter 4, though it might just be a really long carnival session. Maybe things get crazy in castle town, idk.

Justice and kindness also makes sense with genocide becoming available since justice and kindness naturally oppose genocide, unless it was like genocide towards some intrinsically evil force.

Having bravery and patience respectivily sounds really but really cool, i just hope they dont work like undertale fangames usually make it work. Fast edit: The newsletter confirmed chapter 4 has indeed battles

I always thought there'd be a Magenta soul if anything for a secret 8th given how Magenta is different enough from Purple to be a main color in its own right. But looking at it closer, the Purple soul is already more Magenta than Purple

Something I've been thinking of is the 8th soul might be the thing we made in the beginning of the game fighting against us

I’m not 100% sure, but I think that the cyan SOUL was originally the inverse of orange, but they changed it because it was hard to differentiate it from the blue SOUL, especially for colorblind people. As someone else here said, red is much more likely to be the odd one out, since it’s the protagonist’s.

Personally, I want to think that it goes in order of the Mechanics correlating being introduced in Undertale, but reversed. Red comes first and when it gets a gimmick is at the end of the game, and it is the only mode in undertale to refuse, similar to how Kris refuses our control as a player. Yellow comes next, much less to explain. Then where it changes is it would be purple instead of green, because of muffet. Then, another change, it would be Orange instead of purple, not just because there is no purple, but because of orange attacks. Then there is green, and frankly I think it would be better if it wasn't undyne, because then it could get something new like the yellow soul did with the [BIG SHOTS]. Next, there's Blue, obviously. And then finally, theres cyan, so that stays unchanged. This actually still lines up with your inversion theory with how the souls work, as it would be Red, Yellow, Green, Purple, Blue, Orange, and Cyan into Red, Yellow, Purple, Orange, Green, Blue, Cyan, which has all your inversions in the opposite location. Red 1st, Cyan 7th, Yellow 2nd, Blue 6th, Purple 3rd, Green 5th, and then Orange, the only one without a counter, gets put in the middle

this is what 4 years without a new chapter does to us

Navy blue should allow you to move to the position you were at two seconds ago