Back in the abandoned city located in another world somewhere in the multiverse, the entire city is ruins, building a covered by vines and weeds, broken cars are scattered across the cracked streets and broken debris blocks the road.

Inside a tall old building in the city, we enter a large, round office where a group of people gathered around at one table. Amongs the group are Kyrie Illunis, Cinder Fall, Menthuthuyoupi, Clarence "Clay" Morrow, Babatunde, Nigel, Malfatto, Martin "Marty" Jay Williams, Skulker, Dora and the Joker.

This group is known as the Joker Family.

"So, any volunteers in blowing up Cassandra City?'' Joker asked as everyone raised their hands in response, "Ooh~ This might be a problem.'' he mused with a grin.

"My... my... my... what do we have here?" a mysterious voice echoed throughout the room.

"What the fuck?! Who's there!" Menthuthuyoupi demanded as other members are on high alert looking around for whoever the voice was while the Joker stayed calm and composed albeit intrigued to know who their unsuspecting "guest" is.

Then without warning, a mysterious light blue magic circle appeared on the floor on one corner of the room and from it appeared a mysterious individual.

This individual looked like a young man in his late 20s with short slicked back spiky brown hair, pale skin and slim build. He's clad in a gentleman's suit composed of a midnight blue button up blazer over a dark gray button up polo with a black and silver striped neck tie, a pair of midnight blue pants, black dress shoes, a black high collar long cloak, a pair of dark gray gloves, black top hat, a pocket watch in his blazer's left pocket, a dark blue plague doctor's mask with blue tinted glass lens concealing his face with a detachable monocle on the right lens of his mask and held in his right hand was a cane.

"Enchanté madames and monsieurs" the strange gentlemen greeted with the tip of his top hat, "Pardon my intrusion but I was in the neighborhood and I couldn't help but notice the little... soiree you were having..." he mused.

"Who the fuck is that motherfucker?" Clay asked.

"Beats me." Skulker replied with a shrug of his shoulders.

Then Menthuthuyoupi came up to the mysterious gentleman and grabbed him by his blazer causing him to drop his cane as the Chimera lifted him up to his eye level, "WHO ARE YOU MISTER FANCY PANTS?! YOU BETTER TELL US WHAT YOU'RE DOING HERE OR I'LL KNOCK YOU OUT SENSELESS!" he threatened with his fist raised up.

"Now, now, there's no need to be all violent here, I only want to talk." the strange gentlemen reasoned in a carefree manner with his hands raised up despite being suspended in the air by the brute.

"Now, now... put him down, Youpi, I think there's a reason why he's here." Joker advised calmly as Menthuthuyoupi grumbled in frustration while putting said gentleman down whom started to fix his blazer and dusted himself, "I normally don't apologize but I do believe you deserve an apology for that.'' he stated.

"Oh, no it's alright no harm done it's my fault for letting myself in without an invitation after all." the gentleman reassured while dusting his top hat.

"May I know who exactly you are?'' Joker asked with an interested grin.

"Oh, of course! Where are my manners" the gentleman replied as he caught his cane with a kick of his foot as he proceeded to introduced himself, "You may call me Lupin, Nexus Lupin." he said with a bow, "I am but a mere traveler of worlds looking for some amusement in my life but I'm also what some of you would call a "Phantom Thief" or what the Japanese would say... "Kaitou"." he explained.

Dimension Traveler and Mysterious Phantom Thief

Nexus Lupin

"Oh~? And what's a phantom thief doing in my little... soiree?" Joker asked.

"Hmm... Oh, I don't know~" Nexus sing-songed as he casually walked around the room with his arms slightly crossed while holding his cane in his right hand and his left hand holding his chin while looking up at the ceiling in thought, "Perhaps, I'm here to take some of your valuables..." he said which got some of the members on high alert as Nexus casually walked passed them, "Perhaps, I'm here to kill you and then take your valuables..." he said casually which made some of the members put their hands on their weapons, "Or maybe..." he said as he then stopped right in front of the amused Joker as he was now facing him, "I'm just here to make some friends." he claimed.

"Oh~? You want to befriend villains like us?" Joker pointed out with interest.

"Why not?" Nexus replied raising his hands with a shrug as he turned to the rest of the group, "All of you seem to be an interesting lot..." he said as he held his monocle to the right lens of his mask as the monocle briefly glowed as he glanced at every individual in the room, Of course, that includes you..." he said as he passed every individual while still holding his monocle to his mask's lens, "And you... and you..." he listed off as he then he passed Kyrie, "Oh... and even you." he said, "Of course, that includes you..." he added.

Then he stopped as he caught something... or someone... of interest "Oh~~?" he mused as he then walked towards Cinder as he then took a closer look not caring if he's invading her personal space much to her annoyance, "My, my! How interesting!" he mused, much to Cinder's confusion while unknowingly, Nexus' monocle started glowing, "You sure have been naughty haven't you child?" he pointed out, "You went all through that just to obtain that power you now possess?" he questioned, "I have to say that I commend you for obtaining such power but I have to say, that you've been a very bad, bad girl for the actions you've done in order to obtain that." he said while shaking a finger as if scolding a little girl making Cinder grit her teeth in anger for how Nexus is treating her as her only visible eye started glowing, "No wonder you lost an eye and an arm and ended up like that, shame on you." he said in disappointment.

And that was the last straw as Cinder grabbed his neck with her Grimm arm and lifted him up while choking him, "SHUT UP!" she shouted.

"Ekk! E-ekk! Ekk!" Nexus choked as his hands were twitching from Cinder's strong grip.

"I think it's time for you to die." Cinder said coldly as she then used her Fall Maiden powers on Nexus as his whole body glowed orange and disintegrated into ashes.

Everyone looked at the pile of ashes in silence, "Huh… glad to see he's gone now" Dora commented whom was annoyed by Nexus.

"A pity." Joker said.

Cinder sighed in relief glad to get rid of the annoyance but suddenly, someone tapped her on the shoulder twice, turning around, she was met with Nexus alive and well and he had his masked face right in front of her. "BOO!" he shouted.

"AAAAHHHHHHHHH!" Cinder shrieked in freight as she fell backwards and landed on her butt.

This caused almost everyone in the room to burst out in laughter and even Joker laughed like a maniac despite being astonished with the mysterious phantom thief still alive.

"HAAHAAHAHAHAHAHAHAHAHA~!" Nexus cackled while holding his sides and his back hunched forward, "You should've seen the look on your face! Priceless!" he said like a child who succeeded in an epic prank.

"Wha-?! But how-?! You-?!" Cinder stuttered speechless with her face slightly red.

"Sorry... but a magician never reveals his secrets." Nexus replied as he lazily leaned on his cane.

"Grrr..." Cinder growled in fury while standing up as she created a fireball with her right hand.

"Tch, tch, tch, tch... temper, temper, temper." Nexus mused while shaking a finger amused with Cinder's anger towards him infuriating her even more.

"Now, now Nexus, let's not bother Cinder anymore now hmm?" Joker advised as much as he loves Nexus treating Cinder like a child, he doesn't want the Fall Maiden to kill a possible potential ally.

"But of course monsiuer." Nexus complied as he then turned to the leader of the group.

"You said that you want to make friends with us." Joker stated, "Are you for real?" he questioned.

"Oui~" Nexus confirmed, "As I said before, all of you are an interesting bunch and I was thinking... why not make friends with them! So... here I am" he explained while raising his arms up in a matter a fact like fashion.

Joker's amused smirk grew bigger, "I see... well then... would like to join our group?'' he offered.

"Hmm..." Nexus hummed in his thoughts as Joker waited for his answer, "Well... as much as how interesting it may be... I'll have to politely decline, after all, I'm mostly what people call a "One man show"." he said much to most of the group's relief, "But don't worry..." he reassured as he put his left arm around Joker's shoulder, "We're buddies now after all and buddies keep in touch with one another, am I right?" he stated much to the amusement of Joker, "We~ll now... I think it's best that I be on my way." Nexus said while taking a glance at his pocket watch, "I have a lot more sites to see around here before changing dimensions." he explained.

"Oh~? Leaving already?" Joker mused, "Why not stay a little longer?'' he suggested.

"Oh~ no, no, no I couldn't." Nexus mused, "Besides... I think I've overstayed my welcome long enough." he pointed out as he then proceeded to go for the door but not before throwing with a flick of his wrist what looked like a blue card with a black symbol of a plague doctor's mask with a monocle and top hat towards Joker causing him to catch it.

"What's this?" Joker asked as he took a look and saw that it was contact info made from cut up numbers and letters from other prints.

"It's my contact info." Nexus replied without looking back, "We'll stay in touch, I'll let you know if I find something of interest or better yet... you tell me if you find something of interest." he explained.

"Will do." Joker replied while looking at Nexus' contact info, "It was a pleasure meeting you, mister Lupin." he said.

"And to you." Nexus replied, "Oh! And one more thing." he reminded, "Do keep this meeting between us a secret." he requested, "I prefer traveling without being noticed by anyone right now including those big shots that call themselves heroes." he explained, "You see, some of them caught my interest and I'd like to wait for the time when I make my appearance known to them and the rest of the other organizations on a later date." he stated

"Noted." Joker replied with a smirk.

"Merci beaucoup." Nexus said, "Anyway... I guess I've overstayed my welcome long enough, see you all next time" he said. "Ciao~!" he waved goodbye and with that, the mysterious phantom thief disappeared in blue mist as Joker let's out an amused mad laughter while the rest of the members sighed in relief.

Meanwhile in another city, we see Nexus Lupin walking among a crowd of people with an umbrella held in his left hand as it was currently raining.

He then stopped at a corner of a street as he looked up at the raining sky with his umbrella keeping him dry, "The Joker Family..." he muttered "An interesting lot indeed..." he mused, "I do look forward to our future "collaborations" with one another." he said, "And I do look forward to the day I make myself known to you... Heroes Coalitions." he said grinning behind his mask.

Suddenly, Nexus heard the sound of growling and it turned out to be his stomach, "Oh my, it seems all that chit chat has gotten me famished." he mused while slightly rubbing his stomach, "I wonder if there's any place where they might sell any good corndogs around here?" he wondered as he proceeded to look for someplace to eat.

Note: This chapter is originally written by AuraBolter, so all the credits and props goes to him.

A/N: Inspired from someonestupED, damnlastwords, Hope the Victor and Ace Neptune. All OCs and concepts not created by moi were given permission for me to use by it's respected creators.