Ben 10 Multiversal adventures (Ben10X Mega multicrossover)

Chapter6- Ben meets Railgun and sans vs Meltdowner

Ben, sans, Undyne, and Papyrus came out of the time tunnel and landed in an alleyway. Undyne was the first to get up and the first to notice that Ben was still in the form that opened the portal that sent her, sans, Papyrus, and Ben here. and she noticed that he looked like he was stuck mid-fall, Papyrus was next to get up and look around. "Wowie that hurt." He said rubbing his skull. Undyne didn't really think so but then again she was still wearing her armor so she didn't feel much. "Where the hell are we?" Undyne asked to now one in particular. "I have no clue but wowie there are a lot of people." Papyrus said as pointed at the end of the alleyway that led into a city with a lot of people that looked they were all teenagers or younger. "Well great, just freaking DANDY. We get pulled though a portal and go through some weird green tunnel and now we are who KNOWS where with no idea how to get home!" Undyne said in an angry whisper as to not attract attention from humans. "Calm down Undyne I'm sure when Ben unfreezes he can take us back to our world." Papyrus said trying to calm Undyne down. Then sans got up and looked around. "so uh where are we?.. and uh whats up with clock man over here' he asked as he noticed Ben who was still frozen. "No clue but we need to find out where we are and if monsters like us exist here." Undyne said. "well who's gonna do that, the only human that went with us isn't even human right now." sans said as he walked past Ultimate Clockwork. Papyrus noticed something that was under Ultimate Clockwork it looked like a mask.

Papyrus picked and said "What's this." he then put on his face and then and weird holographic effect appeared and when it settled Papyrus looked...HUMAN! Papyrus seemed to have pale white skin, pitch black hair along with brown eyes. Undyne and sans looked at Papyrus' new form with shocked expressions and Papyrus looked back at them with a confused expression. "What does the mask make me look weird?" Papyrus asked confused on why his brother and friend were looking at him weird. sans took his phone took a picture of Papyrus and the showed it to him. "Wowie I turned into a human!" He whispered stunned. "it seems like that mask made some sort of holograph that makes you look human." sans said. "So Tennyson had this on him?" Undyne asked and sans nodded "seems like it." sans responded. "so pap you go out and see if monsters are welcome here." sans said to his brother. "Alright I will be back." Papyrus said as he walked into the street.

Time skip

"Where is he it's been almost an hour." Undyne said as she leaned against a wall. "no clue... i just hope he isn't dead." sans said with concern in his voice. Ben suddenly fell out of the air and changed to human in a flash of green light. Some of the people outside started waling to the alleyway to investigate the light, sans noticed this and teleport-ed him, Ben, and Undyne onto a nearby roof top.  "Ugh what happened?" Ben asked as he stood up. "oh nothing much we got pulled into another universe, fell into an alleyway, papyrus found this weird mask that made him look human.... nothing much." sans replied nonchalantly. "Oh I guess I dropped that I.D. mask." Ben said. "What the hell is an Id mask." Undyne asked. "It's that mask Papyrus found, it makes whoever puts it on look different." Ben replied. "well now that we got that out of the way how about we find my brother." sans said and Ben and Undyne nodded. "Alright i'll go look in the streets and all that, you guys try and look in abandoned places and stay out of sight." Ben said. "sounds good." Sans said and he teleport-ed off. Ben then used his watch to transform into a ghost-like creature with a black line running along his body and a single eye. "GHOST FREAK!" He half shouted. "So you can transform into a ghost?" Undyne asked. "Not exactly I'll explain later." Ghost freak said as he phased through the ground.

Undyne sighed and started jumping from rooftop to rooftop.

Meanwhile with Ben. 

Ben had transformed back into his human form and was walking in the street. As he was walking he looked around and saw that most of the people here were school-age children, he did see older people but they seemed to be law enforcement. Ben was walking when he came across a booth that was advertising a frog character in a kimono and Ben wondered what Rebecca would think of it. He decided that he should bye one for her and give it to her the next time he see's her. He was about to get in line when he got bumped into by a girl with chestnut brown shoulder length hair and eye's in a really fancy school uniform. "Oh sorry about that." She said as she looked at Ben. "Its fine." Ben said as he turned to her. "So your interested in Gekota to?" The girl asked. "I'm not, I'm getting it as a souvenir for my little sis." Ben replied. "Oh cool." She replied. "So what's your name?" Ben asked the girl and she responded "My names Mikoto Misaka." "Nice to meet you Mikoto. My names Ben Tennyson." Ben replied. "So what are your esper abilities?" Mikoto asked. "Esper abilities...?" Ben said witch cause Mikoto to give him a confused look."Esper ability's... you now like the ability to teleport, manipulate fire, or anything... You get them when you get to the city." She explained and Ben nodded  "Well you see I just got to the city and had not gotten my powers yet." Ben said. "Oh so you just got here?" Mikoto asked. "Yep just got here." Ben replied nervously. Just then a girl with  red hair put up in pig tails showed up out of nowhere and grabbed onto Mikoto. "Hey sissy where were y-" Before the girl could finish her sentence she was blasted back by a bolt of lightning. "KUROKO!!!!!" Mikoto yelled angrily. Ben just looked at what just happened in shock (no pun intended).

Meanwhile with sans.

sans was teleporting from rooftop to rooftop looking for Papyrus until he teleport-ed onto a spot that was covered with a tarp that turned out to be a hole. sans fell through and landed right on top of a crate "ow that hurt." He said, he then noticed there were two girls in the room with him. One was wearing beige dress with yellow stockings, she had brown hair and similarly colored eyes. The other girl was wearing a dark blue top shirt with a white skirt and brown stockings. She has blonde hair and blue eyes,She also had a beret. "heh well sorry to "drop" in but i wasn't looking where i was going and got into a "hole" lot of trouble." sans said as he got up. he looked where he had fallen and saw a broken flash drive he looked back at the two girls. The one with the brown hair had an insane, angry expression, the other one on the other hand looked surprised that a skeleton had just fell through a hole in the roof.

"I don't know what you are... But you just destroyed something I was supposed to deliver  and now you are goING TO PAY!!!!!!!!!" She shouted as four green orb's appeared and started shooting beams in sans' direction. sans dodged with incredible speed and said "hey whoa there pal i didn't mean t-" he was cut off by another laser shooting his way, he teleport-ed away just in time. "alright then, you don't wanna talk then lets see what your hiding." He said. sans then checked there LV (L.O.V.E (Level Of ViolencE)) and this is what he found. Shizuri Mugino LV: 20. Leader of ITEM. Only cares for teammates. Frenda Seivelun LV: 20. Is a part of ITEM. Cares for her teammates as well as her little sister.

sans was surprised to see that both of them were LV: 20 but he didn't have much time to be surprised because Frenda lunged at him. sans put his arm out and it started glowing blue and then a blue aura appeared around her and the stopped mid-air. "sorry blonde-y but this is gonna hurt." Sans said as he started moving his hand in several directions slamming Frenda around until she was unconscious. After sans put Frenda down he turned to Shizuri. "listen pal i don't wanna fight but if you attack me again your gonna have one hell of a bad time." sans warned but this caused Shizuri to laugh "You think you scare me... HA I'm the 4th strongest esper in academy city... I am the GOD DAMN MELTDOWNER I'M NOT AFRAID OF SOME BONEY FREAK!!!!!" She shouted as she fired another beam that sans miraculously blocked with a dragon-like skull that was floating there, it was cracked and looked like it barley withstood the impact."fine then" sans thought

"its a beautiful day outside" sans began with his eye sockets closed witch caused Shizuri to give a confused look. "birds are singing, flowers are blooming... on days like this people like you..." sans continued with his eyes still closed. "S H O U L D  B E  B U R N I N G  I N  H E L L" sans said has he opened his eye sockets witch now were pitch black witch slightly startled her. 

Then sans made several of the before mentioned dragon skull (witch were called Gaster Blasters) appear and fired at Shizuri. She jumped out of the way and fired several of her own beams at him sans dodged and said "what you think i'm gonna stand there and take it." sans said as several bones appeared behind him a flew toward her. Shizuri dodged dodged and fired back, sans dodged and made bones come up from the ground. She jumped and when she did sans stuck his hand out as it started glowing blue and a blue aura appeared around Shizuri. he then moved his hand down fast and she slammed in to the bones that were sticking out of the ground. Her left arm and left side had been impaled by two bones. "ya give up yet pal... don't make me kill you." sans said. she said nothing for a while but then her impaled arm exploded in a burst of energy and when the light from said explosion settled a glowing green energy arm replaced the impaled arm. "AAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHH" Shizuri screamed as she sliced that bone that went threw her side in half and charged at sans. sans used his magic to stop and slam her into the wall on the other side of the building. Shizuri attempted to get up but was stabbed in several places including her heart. Her meltdowner arm dissipated as her eyes lost all sense of life. A purple heart appeared above her and sans walked up to it. "guess i might as well" sans said as he grabbed the heart. When he did a blinding light washed over the area as the heart dissapeared and when it died down... sans' eyes were blue.