Academy of the Omniverse)
In the academy, a girl with dark green hair and blue eyes wearing a green kimono managed to bring elixirs to defeat demons without using nichirin swords.

"Keith managed to prepare these elixirs to defeat the demons." The girl said.

"Thank you, Maomao." Ashton said.

The four tribes and other heroes drank the elixirs while the younger members stayed inside the academy.

"Is the monster outside?" Rokuta asked, being afraid.

"You will be safe here." Kairi told the Kamado siblings reassuringly.

Now outside of the academy, the demons along with Heartless, Corrupts Digimon and Primids started to appear, coming from the Infinity Castle's structures.

*Molgera WW (Hyrule Warriors Legends)*

"They are here!" Ashton said as he prepared his katana. "Moon Breathing First Form: Dark Moon, Evening Palace!"

The principal draws his katana and performs a singular horizontal slash following a crescent shape, creating numerous chaotic crescent blades along the path and defeats the enemies.

Maxxor, Tangath Toborn, Intress, Zalic, Blazier, Laarina, Momark, Gespedan, Staluk, Ettala, Maglax, Attacat, Tartarek, Raimusa, Blügon, Arias, Vidav, Iparu, Targubaj, Wytod, Aivenna, Rellim, Heptadd, Mezzmarr, Crawsectus, Frafdo, Nebres, Velreth, Ulfhedinn, Viqtarr, Lomma, Psimion, Accato, Akkrean, Arbeid, Owis, Dractyl, Arrthoa, Prantix, Drabe, Quadore, Eremia, Silchaw, Sukoval, Hifdan, Thonder, Ikkatosh, Illiar, Wytod, Wrenges, Raznus and Kinnianne used their attacks like Pebblestorm, Rock Wave, Rip Tide, Frost Blight, Windslash and Torrent of Water.

Asadab, Lyssta, Chaor, Takinom, Agitos, H'earring, Barath Beyond, Zalvar, Tharax, Ulmar, Magmon, Rothar, Dardemus, Borth-Majar, Grook, Bladez, Ultadur, Nivenna, Khybon, Zaur, Aokua, Narfall, Banshor, Drakness, Bladez, Piddan, Cerbie, Solvis, Toadore, Toxis, Klasp, Xield and Rarran from the Underworld Tribe use fire attacks like Flame Orb, Ember Swarm, Inferno Gust and Torrent of Flames.

Illexia, Odu-Bathax, Tarteme, Mallash, Dubin, Kolmo, Hammerdoom Chantcaller, Aimukk, Lhad, Bierk, Ekuud, Faash, Formicidor, Ibiaan, Kelvedran, Galin, Wamma and Khritlaan from the Danian Tribe use attacks like Rust Toxic, Sludge Gush and Ektospasm.

Iflar, Prince Mudeenu, Ario, Biondu, Brathe, Dakkamal, Drimesse, Fivarth, Gnarlus, Kobarri, Zhade, Siado, Xelfe, Munnari, Vinta, Uro, Qwun, Shimmark, Owayki, Melke, Sobtjek, Marquis Darini and Tiaane use attacks like Cyclone Slam and also use the invisibility to their favor against the enemy troops.

And as for Mugics they use Melody of Malady to unleash fiery winds, Song of GeoNova to unleash a green halo damaging the enemies, Canon of Casualty to unleash fiery barrages, Diminuendo to decrease the size of the enemies, Melody of Mirage to confuse the enemies by summoning clones, Fanfare of the Vanishing to turn the non-Mipedians invisible and use surprise attacks against the enemies, Song of EmberNova to summon a pillar of damaging light against the enemies, Swarm Song to summon swarm-like energies and damage the enemies and Hymn of the Elements to power up the elemental types, and they kept fighting against the demons.

"I hope Caleb and the others can do it." Ashton said.

(Infinity Castle)
Back there, Aria and Lunamon were watching their surroundings exasperatedly when she sees Caleb she tried to reach him but she heard the biwa playing and then they ended up into a different place.

"What…!?" Aria exclaimed.

Then she saw Twilight and tried to approach her but the biwa was heard and they ended up into a different place again.

"Again…?" She said.

She saw Kanao and tried to approach but the biwa played again and they ended up into a different place.

"Argh! Why do the villains always play unfair!?" Aria yelled with frustration as she swung her axe. "Jiminy, mother loving, toaster strudel!"

"Aria, try to calm down." Assana said through her phone.

"Every time you try to reunite with the others, Nakime will play her biwa and you and Lunamon will end up separated and even very far, stay there and wait until Capricorn casts the spell." Aries said through his phone.

"Okay…" Aria said, breathing hastily but calming herself down.

Now speaking of Capricorn, he was invisible and close of Nakime.

"Goodbye playing unfair…" Capricorn said before snapping his fingers and a yellow circle appeared below Nakime and then he stood visible in front of the Fourth Upper Moon. "Go forth, play your biwa."

Nakime stood there and played her biwa but nothing happened, she tried again but it was the same result.

"Now your Blood Demon Art is canceled, and the spell will end until dawn." Capricorn said before jumping in the search for his friends and as he landed he quickly pulled out his phone to call everyone. "Good news, Nakime's Blood Demon Art was canceled, meaning that we won't be separated, now let's take care of the Upper Moon demons."

And with that said the chances of winning increased.

*Ends*

Now with Caleb, Tanjiro, Giyu and Leo.

"The spell was activated, now we'll be able to fight together against every stronger demon on Infinity Castle without being separated." Caleb said and Tanjiro smiled at the good news.

"That's great! Nothing's separating us now, we will win this." Tanjiro said.

"We'll meet in another part." Leo said.

Caleb along with their Digimon and Pokémon and Tanjiro nodded to Leo and Giyu before taking separate ways and as were running across the giant fortress we found Sagittarius, Young Link, Sabito, Makomo, Siegfried, Cloud, Inuyasha, Tai with Agumon, Ruby Rose and Deku.

"It's the spell ready?" Tai asked.

"Yes, spell working, nothing will separate us." Caleb said.

Then we heard heavy steps as we saw a bigger demon with bigger hands but its black and had red eyes.

"Is that?" Young Link said.

"Yes, a dark clone demon…!" Caleb finished.

"It's the same demon that I faced in Mount Fujikasane…!" Tanjiro said, recognizing the Hand Demon. "The Hand Demon…!"

"Yes, but I'm improved by my master, no memories from human life before transforming into a demon, and my master instructed me to kill the Urokodaki's foxes again, because my master wants to see every revived human to be dead." Hand Demon said as he was extending his hands slowly.

Caleb and Sagittarius clenched their weapons while Tanjiro gritted his teeth and got into a fighting stance.

"Like hell we're letting you kill Sabito and Makomon again!" Tanjiro yelled.

"And you have to face more of us here!" Sagittarius said.

"We'll see about it." Hand Demon said.

*Boss Battle (LOZ: Majora Mask)*

-Terror of Mount Fujikasane, Hand Demon-

"We'll finish you off, ugly!" Inuyasha told the Hand Demon.

"Now observe!" Hand Demon said before spinning his arms at 360 degree trying to hit the group.

"Agumon!" Tai said and his Digimon nodded.

"Veemon!" Caleb said and his Digimon nodded too.

Agumon Warp Digivolve to… WarGreymon!

Veemon Matrix Digivolve to… MagnaAngemon X!

Change Mode to… Swordfighter Mode!

The two Digimon Digivolved as the Hand Demon swung his arms to the ground launching debris but WarGreymon used his claws while Magnamon Swordfighter used his sword to break the launching debris, Makomo only could watch as her body is shivering clearly remembering how her limbs were ripped before being devoured while Sabito is panting heavily and realizing that the Hand Demon could be stronger than the last time and also remembered how his sword was broken and then one of the demon's hands extended and crushed his skull to death as the sight was covered with blood.

'Sabito and Makomo are having trouble concentrating…' Sagittarius said before swinging his broadsword and slashing the Hand Demon and followed by launching arrows against the dark clone demon.

"Did you think your arrows could damage me?" The Dark Hand Demon asked.

"Then how about this!" Sagittarius said before launching three bomb arrows which damaged the Hand Demon.

Young Link pulled out his bow to launch ice arrows and froze one the Hand Demon's hands, then Siegfried swung his sword and destroyed the frozen arm, then Cloud used Sonic Break and followed by using Blade Beam, Inuyasha used Windscar, Tai used Fire Cuts with his claws, WarGreymon used Brave Tornado which sliced more enemy hands, Magnamon X used Magna Cuts, Ruby Rose swung her scythe to slash and damage the Hand Demon, Tanjiro performed Sun Breathing Raging Sun, Deku used Manchester Smash and followed by delivering a strongest kick by using One For All at 40%, Caleb performed Bullet Stabs with Schiavona and Keyblade before casting Firaga and followed by the shiny Mew using Power Whip, Makomo and Sabito started to watch seeing that the group is having the advantage against the Hand Demon.

"He is stronger than the last time…" Makomo said.

"And he is using… The Sun Breathing style." Sabito said.

Then they decided to join in fighting against the Hand Demon as they used Water Wheel with both hitting the Hand Demon who then roared before increasing his size, then the Hand Demon extended his hands to the floor and the same dark hands emerged from the floor trying to grab and crush them but they managed to dodge and they managed to slice the arms while Tanjiro was a bit shocked of seeing a new skill who wasn't seen before.

"Wow! That's a new skill he never had before, at least we dodged in time." Tanjiro said.

"As I told you, dark clones, twice as strong as the original ones…!" Caleb said as he used his schiavona to slice the enemy arms and Tanjiro nodded.

"Twice as strong, huh? Well, that just means we have to be twice as careful fighting them." Tanjiro said.

"Yes." Caleb said before dodging and slicing another enemy arm.

"You're right about these Dark Clone demons being stronger. We have to keep dodging these attacks and look for openings to strike." Tanjiro said while focusing on the fight.

Just then dark arms came from the ceiling which caught them by surprise but Caleb spun my body with my schiavona to slice the arms.

"That was new too." Caleb said before seeing the Hand Demon who laughed evilly.

"Urokodaki sealed me in Mount Fujikasane, trapped there for years, he was the fault of my torment, therefore I swore to kill Urokodaki's students, even the ones who were revived!" The Dark Hand Demon said as he was extending more arms.

"Many students trained so hard to become Demon Slayers, all this time and chances of protecting innocent people and therefore I won't forgive you!" Sagittarius angrily said before launching Electric Chuchu arrows which zapped the Hand Demon.

"Tanjiro, this time let me and Makomo be the one to finish that demon to get over the past!" Sabito instructed Tanjiro.

"I... I understand. Good luck to you two." Tanjiro said in understanding.

"Okay, let's slice those arms!" Sagittarius said.

Then they dodged the arms, Sagittarius launched Ice Chuchu arrows, Young Link launched ice arrows and Caleb cast Blizzaga which allowed the members to destroy the frozen arms.

"Impossible…!" The Hand Demon exclaimed as he felt his arms regenerating slowly.

Then Sabito and Makomo jumped.

"Water Breathing First Form: Water Surface Slash!" Both said and they sliced the Hand Demon's head who crashed in the ground and his body was disappearing.

*Ends*

"Impossible, the last time, I was successful in ripping off that girl's limbs before eating her while the boy, his sword, was broken and I crushed his skull...!" The Hand Demon as Dark Clone said in disbelief, not wanting to accept the defeat when he won, managed to kill Sabito and Makomo before being revived.

"Just because you were able to kill and win before, doesn't mean it's always going to be the same. Sabito and Makomo have grown stronger and you were careless enough to underestimate them." Tanjiro told the Hand Demon who was slowly disappearing.

"I thought by having no memories of my human life, not showing regret, it will make me stronger…" The Hand Demon said, still disappearing.

"You were wrong about that. Without your memories, you lose the ability to truly feel. While it may have made you stronger, it also made you careless and arrogant. That was your downfall." Tanjiro said, watching the Hand Demon disappearing.

"I'm glad to know that we overcame the past." Sabito said as the Hand Demon disappeared completely and Tanjiro smiled while seeing Sabito and Makomo.

"You both did well. The Hand Demon won't be harming anyone else ever again." Tanjiro said.

Just then they saw a group of demons coming until a barrage of arrows was launched, Tanjiro recognized the wisteria scent as he watched those demons die after receiving the wisteria arrows and they turned to see Sagittarius.

"They are finished, but more of them could appear." Sagittarius said.

"Nice shooting, Sagitarrius. Those wisteria arrows really made those demons drop."

"You two better hurry up, there are more demons there." Makomo told Caleb and Tanjiro who nodded before continuing running.

Both continued until we found Strider, Sub-Zero, Scorpio, Ryo with Cyberdramon, Mewtwo, Taranza, Kat with Dusty, Hanzo Hasashi, Sakura Avalon and Himura Kenshin who are facing a known demon with a black ninja suit appeared from a black ooze-like swamp, the Swamp Demon but as a dark clone demon.

"So, we meet again, brat." The Swamp Demon told Tanjiro.

"So you also came back as a dark clone... Well, that doesn't matter. You'll lose again just like last time." Tanjiro said, recognizing the Swamp Demon as he clenched his fists.

"I still have unfinished business, even I heard that there are girls around 15 and 16 years old that I could eat, and my appetite won't be finished." The Swamp Demon said clearly remembering the girls that she devoured previously.

"You're a psycho, you know that? You'll never lay another hand on any girl at that age again. It's time to finish you once and for all!" Tanjiro said, narrowing his eyes in anger.

"Better prepare to feel the blade of my scythe, yo!" Scorpio said.

"Sorry pal, but the dinner will be canceled!" Caleb said as he pointed his schiavona sword at the Swamp Demon.

"I devoured Satoko previously, and I can still devour the girls that I want." The Swamp Demon said.

*Boss Battle (LOZ: Ocarina of Time)*

-Psychopath Girl-Devourer Demon, Swamp Demon-

The Swamp Demon split into three.

"Okay, same trick but now each four of us will fight against the three of them!" Caleb said.

The Swamp Demon and his two copies not only attacked with his claws and swamp technique, also used the legs to kick but they managed to dodge, the Hasashi launched his spear stucking the uni-horn demon.

"Get over here!" Hasashi said before pulling the demon to slash him with his two katanas.

Followed by Mewtwo using Zen Headbutt and Iron Tail, Kat using Spiral Heel and Gravity Kick and Taranza trapping the uni-horn demon into a sphere of energy spider-web before slamming him to the ground.

The three-horned demon lunged towards Sakura A but she dodged before casting the Ice card which froze the three-horned demon's left arm before being destroyed by Cyberdramon using Desolation Claw, followed by Ryo using Thunder Edge, Strider performing the Brionac Hyper Combo against him and Scorpio slashing him with his double-edge scythe which was propeller-like slashes.

The two-horned demon lunged at Caleb and Tanjiro but they blocked with their swords before slashing him, Magnamon Swordfighter performed Magna Kick and shiny Mew used Psycho Cut, Kenshin performed Dragon Hammer Flash and followed by using Dragon Soaring Flash, and Sub-Zero performs Deep Freeze which he first lets to be clawed by the real Swamp Demon only to sucker punches the demon before plunging his hand into their stomach, grabbing and ripping out their entrails before freezing them into an icicle, which he violently rams into the demon's right eye socket and took down the demon, but without beating him completely, then Scorpio launched his scythe like a boomerang and beheaded the three-horned demon and Hanzo performed Who's Next! Fatality, which summons a pillar behind him and throws his spear into his uni-horn demon's head, he then pulls out his victim's head, throws it against the pillar and impales it there with his sword.

"Impossible! Those two aren't demon slayers!" The Swamp Demon said in disbelief before refusing to accept the defeat and then summoned a swamp which stuck the opponents' feet and focused on Tanjiro and Caleb. "You two will die first!"

The Swamp Demon said as he lunged but he was suddenly shot by two bullets coming from two revolvers, then they turned to see Erron Black along with Reptile, Ferra with Torr, Ermac (for making him more from the good guys, the one who ripped of Jax's arms was Goro) and Kotal Khan.

"Kotal…?" Caleb said in surprise while Scorpio used his scythe to get rid of the swamp and then Sub-Zero and Hasashi were holding the Swamp Demon.

"The one who brought me here told me that there's a threat that could endanger not only EarthRealm, but also Outworld." Kotal Kahn said.

"Muzan wants to finish every human in the multiverse." Strider said.

"But first you're gonna need this." Caleb said before summoning his inventory (just like a Journey Through Another World) and he gave elixirs. "These elixirs will allow you to hurt and even kill demons in 12 hours."

The five kombatants of Outworld drank the elixirs.

"Now I'm ready." Erron Black said before performing Trick Shot, which Erron throws a sand grenade at his demon's feet, stunning him, then loads a bullet saying 'Swamp Demon' on it into his revolver, fires it, hitting the demon's hip and shattering it and the bullet ricochets up to his opponent's shoulder blade, and ricochets one last time to exit out their shoulder and hit their jaw.

"I'll show you, Noob Saibot copy!" Reptile said before turning invisible and then performed Reptile Disfunction which he charged the demon to grab his head and dislocate his jaw, then gouged his eyes with his claws before crushing the demon's skull into the ground, cracking it and further damaging the jaw.

"Let's have fun!" Ferra said and Torr roared before performing Bone Crusher which Torr bounced the demon with a hammerfist and then slammed his head into the ground, crushing his skull, he then raises him in front of him and uppercuts him in the stomach, shattering their ribs and launching him upwards, then Torr ducks as Ferra runs up his back and hurls herself at the demon, stabbing her claws into the demon's eyes.

"Damn you!" Swamp Demon growled angrily but only to be lifted by Ermac with his energy grip.

"We are many, you are one." Ermac told him.

"I had two before…!" Swamp Demon said.

"Now you're alone." Ermac said before performing 'We are Many', which Ermac flew up into the air before flying into the demon with a headbutt, breaking the skull, then flying back up and flying back into him again, this time with a kick to the neck, snapping it (causing the demon to fall to the ground) and the finally flies down onto the demon, stepping onto their jaw, breaking it.

"Now it's time for your judgment." Kotal Kahn said before performing Sunburn, which Kotal Kahn calls a powerful beam from the sun, scorching the demon and damaging him greatly before he pulled out a large knife and charged the demon, stabbing him through the throat with the blade, the aztec-like man proceeded to grab both ends of the blade, twisting it to snap the demon's neck, breaking it and he then retracts the blade from the now kneeling the demon and delivering a skull a shattering knee strike, cracking the entire front of the demon's skull, knocking him halfway across the place.

"Now we'll finish this!" Caleb and Tanjiro said as they jumped before performing a diving slash which decapitated the demon.

*Ends*

The Swamp Demon's head is lying in the ground slowly disappearing.

"How could you!? Did you think it's all over? My master won't rest until all of you are dead and anyone who remembers you all! My master Is very powerful and even feared by all the inferior demons like us!" Swamp Demon said as he was disappearing.

"Your master sounds like he's nothing but a coward. Anyone who is very powerful should face us themselves, not hide behind their minions and order them around." Tanjiro told the Swamp Demon.

"You have no idea what you will face…" The Swamp Demon said before disappearing completely.

Suddenly more demons appeared but Scorpio swung his twin-edged scythe to slice the demons' heads and kill them too.

"The path is clear, ya." Scorpio said.

"Whoa! That's some impressive scythe work there, Scorpio. You really took care of those demons in no time." Tanjiro told him.

"Thanks, now continue." Scorpio told him and Caleb with Tanjiro nodded before continuing across the fortress.

The two continued until they saw Taurus, Libra, Meiko with Meicoomon, Rika with Renamon, Link, Impa, Robin, Lucina, Dante and Kratos fighting against demons, during the battle, Taurus with his gloves punched a bulky demon's head several times before doing a strong clap which crushed the demon's head while Libra used her rapier to decapitate another demon.

"Taurus, Libra." Caleb called them.

"Caleb." Taurus and Libra said.

"So, what kind of demons did you face?" Rika asked them.

"Two demons who were killed in the past, one was the Hand Demon and another was the Swamp Demon, the two of them as Dark Clones." Tanjiro said.

"That means that Muzan came prepared this time." Libra said.

"Clearly Muzan wants to see us dead tonight but he will pay for all his sins." Taurus said.

Suddenly we heard a strong snake hissing sound.

"What was that hissing sound? Could it be... a snake demon?" Tanjiro asked.

Just as he said a Dark Clone Demon resembling a snake with a mouth reaching from ear to ear and next to the oblique of her chest, her upper torso has three lines and a snake's lower body, said Snake Demon hissed.

"That answers your question? Caleb asked and Tanjiro nodded before narrowing his eyes with determination.

"Yeah, it does. Looks like we found another threat to deal with." Tanjiro said.

"It seems more like a gorgon…!" Taurus said as he cracked his knuckles.

"I slayed many gorgons in my homeworld." Kratos said as he pulled out his blades.

"I didn't see you before." The Snake Demon said with a female devilish voice. "But where I came from I was revered by the Oguro family, they delivered their newborn children as sacrifice, however I have unfinished business with Obanai Iguro and I would have done it, if it wasn't for Shinjuro Rengoku."

As they were listening, Caleb and Tanjiro understood that Obanai had harsh life in the past and also heard Kyojuro Rengoku's father.

"It sounds like you had a connection with the Oguro family, but Shinjuro Rengoku prevented you from doing whatever you wanted to do with Obanai." Tanjiro said in realization. "So, now you're back, but as a dark clone demon. Is that it?"

"Yes, without memories of human lifes, even the demons like us who despised human lives, it makes us stronger instead of dying of irremediable diseases." The Snake Demon said, and we heard carefully, at first point she and Muzan were right because the medicines are very expensive.

"Maybe your master is right…" Caleb told the Snake Demon as he prepared his sword and Keyblade. "But that doesn't mean that we have to leave our humanity, we have to keep living every moment in human life, even despite being close to death, especially against Muzan!"

"Caleb's right. Giving in and allowing yourself to lose your humanity won't solve anything. We have to keep living and fighting to make sure Muzan pays for all the suffering he has caused." Tanjiro said in agreement with Caleb.

"And even preventing Muzan from killing every family revived!" Caleb added, referring to the family of Tanjiro, because he knows that Muzan or his demon always finish the unfinished business.

"You're right, Caleb." Tanjiro nodded in agreement while feeling determination. "We have to protect the families who were revived, including mine. We won't allow Muzan or his demons to harm them!"

"And we'll send you back to hell!" Taurus said.

Then the Snake Demon hissed.

*Boss Battle (LOZ: Phantom Hourglass)*

-Cult Leader by the Iguro Family, Snake Demon-

The Snake Demon started to creep through the floor before spitting an acid and the group dodged, however the acid melted a part of the floor.

"We must be careful with the acid!" Meiko told them.

The Snake Demon attacked by swinging her tail and using her claws but they dodged, then Caleb performed Strike Raid and followed by performing thrusting slashed with his schiavona sword, followed by Magnamon X using Magna Slash and Magna Blast, shiny Mew using Ice Spinner and Fire Blast with both attacks hitting the Snake Demon who hissed angrily only to be slashed by Tanjiro performing Solar Heat Haze and the Snake Demon attacked with the claws but they dodged, followed by Taurus using the Blade of Hope to perform fiery slashes and Libra using her Scale Scepter to summon energy pendulum which hit the Snake Demon who hissed viciously.

"Just a bit more, guys!" Proxi said.

Then Meiko equipping her magic rod and Keyblade she used Mystical Fire and Firaga spell with both attacks hitting the Snake Demon, followed by Meicoomon using X-Scratch, Rika performing Rising Sun and Blizzard Edge, Renamon using Diamond Storm, Link slashing the Snake Demon before attacking her with rushing attack and ended with a thrusting slash, Impa slashed several times the Snake Demon before summoning blades made of water and slashing the Snake, Lucina performing Dancing Blade, Robin casting Thoron, Dante performing Karma with his scythe and Kratos swinging his blades performing brutal combos against the Snake Demon and followed by performing the Nemean Cestus which Kratos anchors himself to the demon with his Blades of Exile, then slides towards her, he then stabs the demon with both blades as he reaches her, slicing the ribcage and then he punches the demon in the face with the Nemean Cestus, shattering her skull.

"We'll finish this! Hinokami Kagura: Beneficent Radiance!" Tanjiro said before spiraling into the air while performing a swing slash while Caleb did a spiraling slash and then both decapitated the Snake Demon.

*Ends.*

"That style, even more powerful than the Flame Breathing…" Snake Demon said as her head was disappearing, referring to Tanjiro's Sun Breathing. "That was why my master wanted to get rid of the whole bloodline of the Sun Breathing users…"

"So Muzan fears the Sun Breathing style and wants to eliminate the entire bloodline. That just gives us even more reason to stop him at all costs." Tanjiro said, clenching his fists.

"That was a curse for his existence, he always finishes the unfinished business, even sends more demons to kill said person or families that were saved while the demons were killed by the Demon Slayers...!" The Snake Demon said as they heard that the demons sometimes come back in more numbers or even one of the Lower Moon demons.

"So that's his plan. He sends more demons to kill anyone saved by the Demon Slayers. It's like he has decided to kill his targets." Tanjiro said in realization and understanding Muzan's twisted actions.

"We were lucky to move those revived families to safer places and therefore you won't be able to hurt them." Caleb told the Snake Demon which head was disappearing.

"Even if I die, no matter if those humans were revived, some scars are impossible to disappear…" The Snake Demon said, referring to the memories when Tanjiro's family was dead, even revived, the Muzan's attack is still haunting them along with all the past relatives of Tanjiro.

"You're right, the scars from the past are painful and won't be erased easily. But that doesn't mean we'll give up. We will continue fighting to make sure Muzan pays for all the harm he has caused. We won't let the memories of the past control us." Tanjiro said, feeling a mix of anger and sympathy.

Just then the Snake Demon's head disappeared.

"How I wish to find a way to erase those haunting memories after the battle against Muzan?" Caleb said feeling guilty but Tanjiro gave a comforting glance and pats Caleb on the shoulder understanding his guilt.

"I know how you feel. It's natural to wish for a way to erase those painful memories. But the truth is, we can't change the past. What happened happened, and there's no way to forget it." Tanjiro told him before taking a deep breath. "But we can face the memories head on and move forward. We must be strong and not let the past hold us back."

"You're right, once Muzan is finished, he won't haunt your family anymore and they like everyone else will be free from Muzan's reign of terror above the humans, even his own demons who see them as pawns." Caleb said, feeling better before adding. "Also there is a saying, the suffering, seeing death or not, will help us to be stronger."

"Yes, once Muzan is gone, everyone will be free from his terror. And you're right about suffering and death helping us become stronger. We've already experienced pain and loss, and it's only made us even more determined to fight." Tanjiro nodded in agreement, feeling a mix of determination and hope and looked towards Caleb with a determined look. "But we must never give up. We must keep fighting until the end."

"At the same time, I can't help but feel bad for the humans who had tragic lives before being turned into demons, now I hope they have a better life after reborning." Taurus said while seeing the place where the less powerful demons died.

"It's true, it's unfortunate that these people were transformed into demons. Hopefully, they can find peace in their next life." Tanjiro said, feeling sadness.

"However, not all the demons deserve respect even in death, just like the Snake Demon who ate newborn children." Caleb said, referring to the Snake Demon.

"That demon looked more like a gorgon, a humanoid snake monster of Greek mythologies who turns the victims into stone." Taurus explained.

"You're right, not all demons deserve respect, especially those who have committed terrible crimes like eating newborn children." Tanjiro nods in agreement, feeling anger and disgust towards the Snake Demon. "And the Snake Demon definitely sounded like a gorgon from Greek mythology. It's good that we took her down."

Then they saw Libra covering her eyes with her blindcloth.

"The demons who had tragic lives were sent to heaven while the Snake Demon was sent to hell." Libra said before uncovering her eyes and Tanjiro is surprised hearing her words.

"It's interesting to hear that the demons with tragic lives were sent to heaven while the Snake Demon was sent to hell." Tanjiro said before asking. "Did you see them or something?"

"I use my blindcloth which allows me to see the demons' fates in the afterlife." Libra explained.

"Really? You can see the fate of demons in the afterlife just by using your blindcloth? That's a powerful ability." Tanjiro said with his eyes widened in surprise.

"It's true, now you two darlings must go." Libra told Caleb and Tanjiro who both nodded knowing that they must continue.

"Alright, we understand. Thank you, Libra." Tanjiro said. "We'll keep going!"

Then Tanjiro and Caleb continued and across the corridors they found Izzy with Tentomon, Shulk, Silver the Hedgehog, Edward with Alfonso, Samus, Weiss, Bomberman, Prince Dastan, Phoenix Ikki and Ryo of the Wildfire with White Blaze.

"I see you two are okay." Samus said.

"Yeah, vivito y coleando." Caleb said with the last part in spanish.

"Since when did you learn to speak Spanish like Chad?" Edward asked.

"I learned some new dialogues which are exclusively in Spanish." Caleb said.

Just then Shulk gasped and foresaw a temari bouncing wildly and causing destruction and back in the present.

"Duck!" Shulk told them.

Then they dodged the upcoming and bouncing temaris until Silver the Hedgehog used his telekinesis to hold the temaris and launching them back as they saw two Dark Clones Demons wearing kimonos, the male has eyes in his hands while the female one has other two temaris, Yahaba and Susamaru.

"You are not going anywhere!" Dark Yahana told us.

"I'll crush you all with no mercy!" Dark Susamaru said, sounding more maniac than her regular form.

*Sinister Shadows (Kingdom Hearts 2.5 Remix)*

-Demon Bounty Hunters, Yahaba and Susamaru-

"Knowing those demons, those two were sent by Muzan when Tanjiro was in Asakusa." Izzy said as he was using his phone to scan both demons. "But those are dark clone demons."

"Well, looks like we've to fight against them." Tanjiro said.

Just then Skye along with Zoe as Kazemon used Air Cutter and Hurricane Wave respectively with both hitting Susamaru, they turned to see both along with girl Sora, Biyomon, May with Blaziken, Twilight Sparkle, Wendy, Kanae, Pyra, Terra Brandford and Kitana.

"We'll fight against the female demon, you continue fighting against the male one!" Kanae told Caleb's group, despite having a pretty face and voice, she sounded serious.

"Alright, we'll continue fighting against Yahaba. Thanks for offering help, Kanae." Tanjiro told her.

She smiled at them before she and the other girls went to fight against Susamaru.

"Now I see why Kanae is suitable to be the couple of Sanemi, her kind behavior calms down Sanemi's anger issues." Caleb commented and Tanjiro nodded in agreement.

"Yeah, I've heard about their relationship before. It makes sense that Kanae's kind and calming nature would help balance out Sanemi's fiery temper and anger issues." Tanjiro said.

"Are you finished? Or you'll come at me?" Yahaba asked.

"Bring it!" Caleb said.

Yahaba launched arrows across the ground and air but thanks to the Invisi-Eye spell, the arrows are visible and easy to dodge, then Izzy and Tentomon used Thundaga and Super Shocker to zap Yahaba, Shulk used his monado to increase speed and slash Yahaba several times, Silver the Hedgehog used his telekinesis to return back the arrows sent by Yahaba before attacking with energy blades, Edward used Alchemy Spear, Samus fired her Wave Beam, Weiss summoned icicles to send them at Yahaba, Bomberman launched Ice Bombs which froze both arms of Yahaba much to his frustration, then Ryo of Wildfire used Twin Flame Slash while Phoenix Ikki used Phoenix Illusion Demon Fist with both skills destroying the frozen arms of Yahaba who roared in pain, followed by Dastan slashing the demon from behind, shiny Mew using Fire Spin, Magmamon Swordfighter slashing him with his sword and Caleb with Tanjiro thrusting their swords hitting Yahaba who had enough and managed to regenerate his arms before yelling and sending a barrage of arrows hitting everyone.

"I won't be defeated by a lot of meddling fools…" Yahaba said with fury but suddenly a gun was shown before firing a bullet which hit Yahaba. "Now what!?"

Then they turned to see a new group, a gray and black robot but has human skin in the chin and mouth along with a man who seems like Arnold Schwarzeneger and dressing as a biker, a man wearing black sleeveless shirt, black pants and black boots, wielding a bow and an arrow and seems like Sylvester Stallone and man wearing black and white suit with a red cape included.

"They are Robocop, Terminator T-800, Rambo and Spawn…!" Caleb said in surprise and relief.

"Now face your worst nightmare." Rambo told the demon.

"I'll put an end to you!" Spawn said as he prepared his hell chains.

"You're not a human." T-800 told Yahaba as he prepared his shotgun.

"It's because I'm a demon!" Yahaba said.

"Yahaba, by following orders to kill, you're under arrest!" Robocop told Yahaba. "Dead or alive, you are coming with me."

"I wanna see you four try!" Yahaba dared.

"Freeze!" Caleb said before casting Blizzaga but in a different way which was firing ice balls from his Keyblade which froze the limbs and mouth of Yahaba and turned the four new members before summoning his inventory and gave elixirs. "Drink the elixirs to damage that demon!"

They nodded before drinking the elixirs as Yahaba managed to use his arrows to break the ice without damaging himself, then Robocop used ED-209 which he propulses himself at his opponent with his flightpack and with his Riot Shield drawn bashes Yahaba, after stunning the demon with the shield, he quickly shoots him three times with his Auto 9 before bashing them over the back of his head with the firearm, then puts his Auto 9 away, grabs the stunned demon by the throat and pierces their abdominal area with his Terminal Spike, piercing not only the spike but this entire hand and forearm completely through the demon before launching him towards an ED-209 with a powerful punch, bouncing him off the ED-209 that opens fire onto the demon with its machine gun before blasting him away with a rocket.

T-800 performed Chill Out and stunned Yahaba by striking him with his shotgun, then striking him again in the chin with the butt of his shotgun, the Terminator then points the barrel of the gun directly in his face and gives a thumbs up and smile, before firing the shotgun and knocking him away but before the demon has the chance to gain any more distance.

"Get over here" T-800 grabs him by the leg and pulls him back.

Then holds him by the neck and slams his head first onto the ground, which causes him to bounce back up into his chokehold and he then punches the demon in the face one final time, followed by a headbutt that knocks him away.

Then Rambo performs Lone Wolf which he hits and stuns the demon with his bow before rolling towards him, stabbing his thigh, slashing at his neck, and impaling his gut with his knife, he lifted his opponent with the knife still in him, takes an explosive arrow from his quiver and stabs it through him chin, with the arrowhead exiting through the cheek and then he kicks him away and shoots the explosive arrow at him.

And Spawn performs the Eight Circles of Hell which he tosses a stun grenade at the demon, then jumps in the air, where he pulls out his submachine guns and spawns an armada of weapons with his Demonic Cape and blasts the demon with a barrage of gunfire, he then summons the arms of Malebolgia that force the demon to the ground and claw at his upper body, then he summons one of his chains beneath the demon, piercing through his chest to briefly launch him in the air, only for Spawn to rain down a powerful fist coated in Necroplasm, knocking the demon to the ground and causing an explosion of Necroplasmic energy.

"Now let's finish him!" Caleb said (iconic phrase of Mortal Kombat before killing the opponent) and Tanjiro nodded.

Then Tanjiro performed a Lateral Water Wheel while Caleb performed a hurricane slash with both weapons and decapitated Dark Yahaba whose head crashed on the ground.

"Not again! You damn brats! I was supposed to win this time! I won't forgive you! I'll never forgive you! I'll make you two sure pay for making a fool of me twice! My face is filthy again!" Dark Yahaba shouted at Caleb and Tanjiro. "I swear I'll bring you two down…"

Just before Dark Yahaba could do something, Caleb swung quickly the schiavona sword many times, slicing Yahaba's head into many pieces.

"Why don't you just shut up and accept defeat, you damned bad-loser scum!" Caleb told Yahaba before spitting at the remains of his head much to Tanjiro's bewilderment.

"Why you little son of a...!" Dark Yahaba tried to say until I stomped his mouth with my right foot.

"That was so close, the cowardly trick of taking us down with him." Caleb told Tanjiro with relief.

"Yeah, that was a close call. He almost got us with that cowardly trick. But you were quick and put an end to him. Just like you said, he really was a bad-loser scum." Tanjiro said in agreement, feeling a mix of relief and annoyance at Yahaba's attempt to take both down with him.

"Well, duty calls." Caleb told the four newcomers before going to see the girls.

Skye, Kazemon, Girl Sora with Biyomon, May, Twilight Sparkle, Wendy, Kanae, Pyra, Terra Brandford and Kitana were fighting against Dark Susamaru who was launching temaris with nonstop against them, now having six arms.

"No mercy! No mercy!" Dark Susamaru said maniacally.

"She still believes herself one of the Blood Moon Demons." Caleb said with a bit of annoyment.

"It's time to help them!" Tanjiro said and Caleb nodded.

Then the two dashed at high speed and slashed Susamaru's arms.

"Look who decided to show up!" Susamaru said as her six arms regenerated. "This time Tamayo is not here to save your sorry butts!"

"Maybe she is not here, but this time we're stronger than before." Caleb said.

"And we will defeat you!" Kazemon said before slide evolving.

Slide Evolution to… Zephyrmon!

"I'll show you no mercy!" Susamaru said viciously before tossing temaris but Skye used her winged boots to kick the temaris back at the female demon.

Then Zephyrmon used Hurricane Gale, followed by Biyomon using Drill Peck, girl Sora performing Aerial Slam, May used Fire Raid, Blaziken used Overheat, Twilight used Sacred Sword, Wendy used Sky Dragon Claw, Kanae performed Honorable Shadow Plum and Crimson Hanagoromo, Pyra switched to Mythra before using Lightning Buster, Terra Branford casted Holy and Kitana tossed her fans.

"Farewell!" She said before performing Slice and Dice that she uses her fans to slice Susamaru before lifting her up with an uppercut from it and in the air, Kitana throws both of her fans straight into her neck, piercing halfway through it, she then jumps and slams her onto the ground, making the already lodged fans to go all the way through the neck, and then letting her back upright, she pulls out her fans, which propels the demon forward, and proceeds to knee the demon in the head, shattering part of her skull.

"Watch this!" Caleb said before using flowmotion.

"Hinokami Kagura: Dancing Flash!" Tanjiro said, performing his technique.

Then the two of them managed to slice Susamaru's head and crashed into the ground.

*Ends*

"I can't be, I should be one of Blood Moon Demons!" Susamaru said in disbelief.

"Well, your bark wasn't stronger than your bite." Caleb said as he held his two weapons just in case.

"You have no idea who you are facing!? Kibutsuji is completely powerful! He will destroy you all eventually!" Susamaru said before disappearing completely.

"We trained enough and we're prepared for this!" Caleb declared.

"You're right, let's go!" Tanjiro said.

"Later we'll reach you guys." Skye told Tanjiro and Caleb.

"Thanks, we appreciate it. We'll do our best to keep moving forward, you take care as well." Tanjiro told Skye's group who nodded at him.
The two continued until they found a particular room where we saw Natsu, Big Daddy, Future Trunks, Rukia, Renji and Ren Amamiya with Morgana.

"I see you two are safe." Rukia told us.

"Yeah." Caleb said.

"We better hurry up to keep safe the future of the multiverse." Future Trunks said.

Suddenly we heard a strong sound and then they saw Blake, Gemini, Terran and Genya facing Kyogo, however the father turned into a demon and had pinned Genya against the wall and grabbed him by the neck while Gemini, Blake and Terran have few scrapes in their bodies.

"Gemini, Terran, Blake, what happened?" Caleb asked them.

"A demon had Genya pinned against a wall." Blake P said.

"That one is Genya's father, Kyogo Shinazugawa turned into a demon…!" Terran said.

Then Caleb's group hid along with Gemini, Terran and Blake thinking in a plan to attack but without hurting Genya.

"I think Genya told me that his father is a big man who used to beat everyone in his town. He was very hated until he was killed, but I never thought he was transformed into a demon." Caleb whispered to Tanjiro.

"I see... So that's Genya's father. I heard Genya mention him before, but I didn't know he was beaten and killed either. It's sad that he was transformed into a demon. No wonder Genya dislikes his father." Tanjiro said.

"Genya also told me that Kyogo, his biological father, used to beat Genya with Sanemi and their siblings, even their mother." Caleb sassily whispered, referring to Genya's father and Tanjiro nodded, feeling a mixture of anger and sadness.

"Yeah, I heard that too. Genya said that Kyogo was an abusive father who beat not only him, but Sanemi and their other siblings as well. It's terrible that they had to go through that kind of treatment from their own father." Tanjiro said.

They managed to hear Genya speaking with his father turned into a demon.

"Never wound what you can't kill." Kyogo told to Genya.

"I know you used to be feared in my town, but turning into a demon only will make things worse, you better stay away from my family...!" Genya told his father.

"I like being a demon, it makes me happy." Kyogo told Genya, Tanjiro couldn't help but cover his mouth in shock hearing that Genya's father is beyond redemption even before transforming into a demon. "And after killing you, I will kill Sanemi along with your siblings and lastly Shizu."

Tanjiro feels shock and anger hearing Kyogo's words, feeling disgust at the man's lack of remorse and intent to kill his own family.

"Disgusting... How can he say such things? And he's planning to kill Sanemi and the others after killing Genya. We have to stop him." He said.

Just then Gemini used her two daggers, stabbing Kyogo's back.

"You're a monster!" Gemini angrily told him.

"Mind your own business, you stupid girl!" Kyogo growled as she slapped Gemini but not enough to take her down. "I'm his father and I can do everything that I want with my family!"

But then Genya used his sword and stabbed it into Kyogo's chest.

"I already buried my father!" Genya said.

Before Kyogo could attack, Tanjiro interfered and slashed Kyogo before watching Genya standing up to his father and feeling proud of his bravery.

"You're right, Genya. You've already buried your father. He may be your biological father, but he doesn't deserve to be called a real parent." Tanjiro said and Genya nodded in agreement.

"I see you have the softhearted side from your mother, you're weak now, you're not a son of mine!" Kyogo told Genya before pushing him.

Tanjiro and Caleb watched Kyogo push Genya and feels more anger towards the man turned into a demon.

"Don't you dare say that! Genya is your son, and you should accept and love him like a real father should!" Tanjiro said in retaliation.

"Silence!" Kyogo shouted before grabbing Tanjiro by the neck. "I'm in charge of my family and I can do everything that I want! I won't tolerate that bullcrap of acceptance or tolerance!"

However Caleb jumped before slashing in the back and releasing Tanjiro.

"Even before transforming into a demon he was a monster from the beginning, so let's send him back to hell!" Caleb told Tanjiro, referring that even if Kyogo was human outside, he is still a monster inside and he nods, fully agreeing with Caleb's words.

"You're right, even before turning into a demon, Kyogo was a monster from the start. We'll send him where he belongs, back to hell." Tanjiro said.

"You won't get rid of me!" Kyogo shouted.

*Middle Boss Battle (LOZ: Ocarina of Time)*

-Genya's so-called father now a demon, Kyogo Shinazugawa-

Then they started to attack Kyogo who was attacking with the fists and legs, but they managed to dodge his attack, then Gemini was using her twin daggers with knifes from her soles while Terran his double-edged axe with chained ball and Blake his scythe with twin ring magic attacks included while Caleb, Tanjiro and Genya are using their swords to fight against Kyogo.

"I was left alone in hell and it was the fault of those crappy siblings!" Kyogo shouted, referring to Genya and Sanemi.

"You're wrong! It was your own fault that you were left alone. You inflicted hell on your family, especially Genya and Sanemi. You brought this upon yourself." Tanjiro said, feeling anger and disgust towards him.

"I used to domineering all of them, my wife and my so-called sons, but since the day I was killed I was alone in hell, only when Shizu arrived I controlled her again until one day she was moved from hell while I stayed alone again, even my master told me that she along with Genya and his siblings live happily without me, therefore I accepted to transform into a demon to kill them!" Kyogo told the heroes' group, but not one of them showed sympathy.

"You say you controlled your family and became a demon to kill them because you felt alone in hell? That's a pathetic excuse. You treated your family horribly and brought pain and suffering to them. They had every right to live happily without you." Tanjiro said, feeling pity for Genya's so-called father.

"I warn you, meddling brats, stay out of my way or I will beat you to death!" Kyogo warned them.

"Very well, if you want to be the enemy and even a traitor of humankind, then so be it!" Caleb told Kyogo, willing to kill Genya's so-called father.

"Yeah, we can't let you threaten us or harm anyone else. You've made your choice to side against humanity, and now you'll pay the price." Tanjiro said in agreement with Caleb, determined to take down Kyogo.

Terran, Blake P, Gemini, Genya, Tanjiro, Caleb with Magnamon X and Mew used their regular attacks, Natsu used Fire Dragon Roar, Big Daddy used his drill, Future Trunks, Rukia and Renji used their swords Ren A used his knife and gun.

"Shadow Breathing: Nocturne Slash!" Genya said and his sword covered in darkish energy and decapitated Kyogo.

"No, I refuse to lose, I'll take you down before dying!" Kyogo shouted and then his body moved to beat them but then Terran summoned a stony wall before grabbing and pushing Kyogo's body to the stony wall, despite being 12 years old, Terran has many strength surpassing the one of Kyogo and the boy was slamming the pathetic excuse of father many times as possible until his head disappears completely.

"Wow, Terran is surprisingly strong for a 12-year-old. He's not letting Kyogo get any chance to retaliate." Tanjiro said in surprise.
Terran continued slamming Kyogo until the stony wall cracked but then Kyogo's managed to push him but Terran landed fine.

"I refuse to go back to hell…!" Kyogo shouted as he charged at them.

But before he could reach then the stony wall fell and crushed Kyogo's body.

"No, I won't rest, I won't rest…" Kyogo's head said but he disappeared completely.

*Ends*

"I'm glad to know that I overcame my past before becoming a Demon Slayer." Genya said with relief.

"It looks like Kyogo's finally gone for good. He won't be coming back." Tanjiro said before turning to see Genya understanding the relief he feels. "Yeah, I'm glad to see that you've overcome your past too. You've become a strong Demon Slayer, Genya."

"Thanks, Tanjiro." Genya said.

Their friendship improved a lot, at first it wasn't a not very pleasant encounter on Mount Fujikasane, then in the blacksmith village it was going more or less and then in the training both are already better friends, hopefully with extra heroes the known faces from this world will be safe.

'I'll better use the Mugician Lyre.' Caleb said in his thoughts before opening his inventory and pulled out a Mugician Lyre to play it and then he pulled out a Mugic before lifting it and firing the mugician from his Keyblade to use said Mugic. "Song of Future Sight!"

Then the Song of Future Sight was played and an orangish aura was manifested before showing images to Caleb, one where Shinobu's right b*** is damaged, other were she does her best fighting but then she dies by being absorbed by Doma as Kanao wasn't able to save her.

"Huh…!?" Caleb gasped in shock.

"Caleb, what's wrong?" Tanjiro asked him.

"Shinobu will be in peril, we better hurry up!" Caleb hastily said and Tanjiro nodded in understanding.

"You two continue, Genya will stay with us while we're fighting against the demons!" Blake told Caleb, Shiny Mew, Magnamon and Tanjiro and they nodded.

"Alright, we'll go ahead to help Shinobu while you guys handle the demons here." Tanjiro told Gemini's group.