I don't own Dragon Ball and Kimetsu No Yaiba Dragon ball is owned by Akira Toriyama and Kimetsu No Yaiba is owned by Koyoharu Gotouge.
Last time Tanjiro and Goku are told by Giyu to go a see a man called Sakonji Urokodaki who lives at the foot of Mount Sagiri.
Chapter 2
Mean while in the Dragon Ball Universe Gohan, Goten, Chi Chi, Bulma, Vegeta, Trunks and Piccolo have gathered all 7 dragon balls and have summoned Shenron in attempt to wish Son Goku back but it's far beyond Shenron's power so no wish was made with the Dragon balls. This causes Bulma to try to invent a dimensional travelling machine with enough fuel to travel were Goku is and back but it would take some time even when part using the damaged time machine found from the cell saga.
While in the Kimetsu No Yaiba Universe Tanjiro and Goku found a cave and placed Nezuko in the cave to protect her from the sun. Tanjiro makes Goku stay with Nezuko has he goes to find something to use for carrying Nezuko during the day time. Tanjiro comes back with a Basket that has a hole in it along with some bamboo, Goku ends up helping Tanjiro fix the hole in the basket along with reinforcing it with the bamboo.
Later on after sunset Nezuko was out of her basket walking alongside Tanjiro and Goku who both saw a temple in the distance and Tanjiro says he smells blood and Goku says he senses a strange ki. All 3 of them run up to the temple and Tanjiro swings the door open and both Tanjiro and Goku are shocked to see a man eating demon eating people and didn't notice that Nezuko started drooling
The demon looks at all 3 of them and asks are all 3 of you humans since I am picking up a weird vibe. Then the demon launches himself at Tanjiro who part defends himself with the hatchet cutting the demons mouth and the demon says how not going to be lucky to do that again but before the demon pins Tanjiro, Goku punchs the demon away and the demon then says I knew something was off about you but what are you? Your not a demon but you also don't seen to be human. Goku then says that he's a Saiyan which confuses both Tanjiro and the demon. Then just as the demon is about to attack again Nezuko then takes notice and ends up kicking the demon's head off surprising her brother and Goku.
The demon ends up growing arms from this head and the headless body attacks Nezuko while saying why is a demon teamed up with two humans. While the demon's head with arms is attacking Tanjiro and manages to get hold of the hatchet's blade which causes Tanjiro to headbutt the demon and throw the hatchet with the demon's head into a tree trapping the head.
Tanjiro then finds Goku and Nezuko fighting the headless body and he charges in taking himself off a cliff along the the demon's body and luckily Nezuko caught her brother saving him. They went back to the demon's head trapped between the tree and Hatchet and Tanjiro pulls out a knife to stab the head and a old man appears and says you cannot kill him with that and Goku asks how can we kill it? The old man then said try to figure it out yourselfs.
Giyu Tomioka's letter to Urokodaki:
Greetings Lord Urokodaki Sakonji.
I have sent a boy your way says he wants to become a demon-slayer swordsman he had the courage to fight me unarmed. A demon slaughtered his family transforming his surviving sister into a demon but she chooses not to attack Humans. I sense something in these two that is different from the others. Like you the boy has a strong sense of smell. But I have also made someone go along with them and that other young boy said he can sense life energy from other beings. I do believe that both boys could be worthy of carrying on your traditions, so please train them.
I know this is a selfish request so please forgive me.
Tanjiro got hold of a big rock wanting to smash the demon's skull in but didn't do it instead he just wants to know away to finish it in one final blow. The old man says to himself sorry Giyu Tomioka this kid isn't going to cut he has to much sympathy even for a demon. But Goku shoots a ki blast at the demon because Tanjiro was taking to long and this gets Tanjiro and the old man concerned about what he actually is.
The demon's head part heals and wakes up and is about to attack but is pinned down by Goku and sunrise starts and when the sun touches the head the head disappears into ashes. This causes Tanjiro to panic about Nezuko and tries to find her and he finds her in her basket with the cover on in the corner of the temple.
He then remembers about the old man and walks to the side of the temple and sees the old man burying the demon's victims. The old man announces himself has Sakonji Urokodaki and Tanjiro says I am called Tanjiro Kamado and my sister is called Nezuko Kamado and Goku announces himself has Son Goku. Urokodaki then askes Tanjiro what he would do if his sister harms a human and Tanjiro is to shocked to answer the question is a slapped my Urokodaki who then says your to slow at making decisions which made you fail to kill that demon before sunrise and also says if your sister harms a human you then have to kill your sister and slit your own belly open and die same goes for your friend Goku.
Goku is caught back my this and says he and Tanjiro will make sure that she would never harm a human and Urokodaki then says Tanjiro get your sister and you both follow me. Tanjiro has trouble keeping up with the Urokodaki while Goku is able to keep up with him. Once they arrived to Urokodaki House Tanjiro askes if he passed the test and was stocked when he heard the test starts now. Goku was already ready to take the test has along has there's no writing involved.
Urokodaki takes Tanjiro and Goku to separate parts of the Mountain and told them both to make it back before sunrise. Goku tries to use instant transmission and then is really worried that he can't, he also tries to fly and is also annoyed that he can't fly too. He also tries to turn super Saiyan for some light but can't so he just starts this way down the mountain and ends up getting hit by multiple traps.
Meanwhile Tanjiro is trying to make his way down his side of the Mountain and he realises that the air is thinner than he normally use to live while trying to avoid the traps and still gets badly injured from them but he manages to get back in time. While Goku just gets back in time with a bit more injuries than Tanjiro since Tanjiro managed to avoid some of the traps as Goku got hit by all of the traps.
Goku is lucky that he's more durable than humans thanks to being a saiyan and once he heals from his wounds he gains a zenkai boost. Urokodaki says Tanjiro Kamado and Goku I accept both of you as my students.
Tanjiro and Goku are both informed about the Demon slayer corps and that there's a few hundred members and that it isn't officially recognised by the government. But it has existed since days of old still hunts demons today. However the identity of the leader of the demon slayer corps is shrouded in Mystery.
Demons staple food humans they kill humans and eat them. It is unclear when or where they first appeared the only ways to kill them are by exposing them to sunlight or cutting off their heads with a special sword. They have impressive physical abilities and their wounds heal quickly.
They can reconnect severed flesh and grow new limbs. Some demons can change form others possess strange powers. This of course got Goku excited to fight them after all he likes to fight strong opponents. Also the way demons can regrow limbs makes Goku part think of Piccolo.
Goku is also worried that the Dragon balls might not be powerful enough to get him home and he doesn't know how correct he is.
The information continues the demon slayer corps fights demons face-to-face, they are human so their wounds heal, slowly and lost limbs do not return! None the less, they fight demons in order to protect ordinary people.
Urokodaki says that he's a trainer. Just like it sounds, I train swordsmen. There are trainers in different places, they use various training methods. In order to join the demon slayer corps, you both must survive the final selection at Mount Fujikasane. I decide whether both of you may have a go at the final selection.
Before going back to training Urokodaki asks Goku what he is and Goku explains that he is a Saiyan and is from another Universe Urokodaki and Tanjiro smell that Goku is telling the truth. Goku has to wait for Tanjiro to finish his more advanced training down the mountain before he has his own turn.
Tanjiro notices that the air is even thinner and with the traps becoming a lot more dangerous and had to do it all again with a sword which took a while Tanjiro so far has trained for a year. Goku finally started his training after doing a bit of his own.
Goku ended up not just sensing ki energy of other beings he also ended up see aura which allows him to see and part avoid most of the traps. Goku did part use suppressed kaio-ken (like times 1.5) which allowed him to avoid some of the traps but it did part have so toll on him.
Goku managed to learn how to do concentrated breathing and the ten water breathing forms in a few days which surprised Urokodaki. Goku did also easily cut the bolder in one go and said that he would only got to the final selection with Tanjiro since he promised to protect him and offer to part help train Tanjiro.
End of Chapter
Author notes:
Oh boy doing it's part hard making these chapters on a phone since I save it to save in on the sight and use my console to upload the chapters I don't know when I will start chapter 3 since I am planning to get a tablet in the future which would make somethings easier.
I am also thinking that Goku should try to teach Tanjiro the kaio-ken but I don't know if that's a good idea or not so feedback is necessary for this decision. Plus I know this is the first Dragon ball, Kimetsu No yaiba Crossover fanfiction.
I will make two different versions of Chapter 3 one with Goku teaching Tanjiro the kaio-ken and another were Tanjiro isn't taught the Kaio-ken. I will upload the 1 wanted the most. Both will have Sabito and Makomo.
Chapter 3 might take a while to do longer to do so don't expect it soon.