A/N: Hello, my wonderful fans. Sorry it's been so long since I updated, but I've been trying to catch up with other stories I haven't paid as much attention to lately. But, good news! While you're waiting for my story to be updated, you can read another story. The very talented Nacoma23 has written "Two Knights in Arkham", a story where Jaune now joins Batman to bring the Joker to justice and restore order to the out of control Asylum.

Although, some sad news, as well: as some of you knew, there used to also be stories of Sun and Ren joining aiding Batman throughout the asylum, but sadly, both of those stories were abandoned and deleted by their writers. So, once again, I'm issuing a challenge: who is willing to write a story where either Sun or Ren, two of the best suited RWBY characters to work alongside Batman, fight the evils of the rampaging asylum alongside the Dark Knight?

Or, since the fans have been requesting this a lot lately, perhaps a certain girl with orange hair, green eyes and sword coming from her back can find herself on Remnant and help our Caped Crusader bring the escaped criminals to justice? That's right, we need Penny to help Batman dethrone the clown prince of crime. Do any of you think you're up for one of these challenges? I'd love to see what you come up with.

But for now, please enjoy what I've come up with as our favorite blonde brawler braves the dangers of Arkham City!

"The Joker poisoned you?!" Yang asked.

"Yes. He's injected his own contaminated blood into me, as well as shipping it out to hospitals all over Gotham. If we don't get that cure, when the Joker dies, myself and hundreds of people in Gotham hospitals that have received blood transfusions with the Joker's blood, will share his fate." Batman explained.

"That monster!" Yang shouted, tempted to jump back up there and beat the ailing clown within an inch of his life and let the poison take care of the rest.

Suddenly, the phone taped to Batman's chest, which the two only now noticed, Yang's anger making them temporarily oblivious, began to ring. Batman peeled the phone off his chest and glared at the image of Joker. "You bastard! You better hope that poison kills you before I get a hold of you!" Yang snapped, before Batman held up a hand to silence her.

"I'm listening." The dark knight told the clown prince of crime.

"Is someone feeling a little down?" Joker asked as if talking to a toddler.

"You'll be down in a minute if you don't tell us how to cure this!" Yang snapped.

"Jeez, Blondie, cheer up! It's not like YOU'RE the one dying here. But you DID ask the right question! I had our cold-hearted friend Mr. Freeze making it. But he's gone dark on me." Joker explained.

"I'll find him." Batman said.

"I bet you-" Joker started, before Batman crushed the phone in his hand, taking out the memory card and inserting it into his radio frequency device, uploading the frequency to Yang's device as well.

"Why would you want to keep that? So you can stay in touch with that psychopath?" Yang asked.

"No. But now we can listen in on his communications." Batman explained. He then called up his faithful butler, Alfred Pennyworth. "Alfred, Joker's poisoned me. He may have poisoned Gotham as well. Mr. Freeze has the only cure." He explained.

"Then what are you waiting for? He's in Arkham City. Find him!" Alfred instructed urgently.

"If only it was that simple. He'll be somewhere cold. He needs to be kept at Sub-Zero temperatures to survive." Batman explained.

"Um... Not too hard to find Sub-Zero temperatures here. It's winter after all. This suit's got thermal underwear and I'm STILL freezing." Yang said.

Batman simply reached over and began recalibrating Yang's cowl. "I'm aware. I've recalibrated your goggles and my cowl to track heat signatures so we can detect the coldest point in Arkham city." He explained.

"Oh. Alright, then! Let's find ourselves a snowman!" Yang said as they grappled away. The two of them began to track down the heat signature, or lack thereof, until they heard a loud bang rang out. "A gunshot." She said.

"I'll go check it out. You stay on the hunt for Freeze." Batman instructed.

"But sir, shouldn't you be with her when you reach Mr. Freeze? You need that antidote as soon as humanly possible!" Alfred said worriedly.

"He should be fine, Alfred. Aura should slow the effects of the poison for a few extra hours. Plenty of time to stop that shooter, deal with any other crazy mysteries in this place, stop protocol 10 and STILL take the cure." Yang explained.

"Exactly. There are innocent people out there in Arkham City. Their safety comes before mine. And even the criminals don't deserve to be gunned down." Batman said heroically, before gliding off in the direction of the gunshot.

Yang, meanwhile, did as Batman instructed and continued towards the coldest point in Arkham City. After a few moments, she discovered it to be. "Huh. The old abandoned GCPD station. Criminals hiding out in a police station. Oh, irony." She chuckled as she searched around the building for a way in, dealing with some of Joker's thugs, before finding a closed security door and used her lightning dust rounds to jolt the electric panel that raised and lowered the security door, raising it just enough for Yang to slide under it.

She then turned towards the door, but noticed an unconscious thug lying in front of it. "One of Penguin's goons. Ooh, look what I found." She said, picking up the thug's fallen radio, taking a chip out of it and calibrating her radio frequency device to be able to reach Penguin's frequency, so they could now hear the diminutive crime lord's communications. Yang smiled at this, putting a hand to her earpiece. "Hey, guess who found Freeze's hideout and got a chip to hear Penguin's communications? This girl!" She told Batman proudly.

"Good work. It looks like Deadshot's here in Arkham City. He's too smart to have gotten himself captured, so he must be here fulfilling a contract for Strange. His victim had assisted in the building of Arkham City. Strange is tying up loose ends. But I'm sure if Deadshot sees us, he won't hesitate to shoot, so be careful." Batman told her.

"Thanks for the head's up." Yang said, ending the communication. "Careful, right. I'm only about to head into a closed space with a guy in a super suit with an ice gun that shoots fast as a machine gun and can freeze people solid in a single shot. No worries there." Yang said as she entered the building.

Inside, Yang quickly grappled up to the rafters as she listened to the conversation in the forensic lab in the next room over. "The Joker's crew are still outside, Mr. Cobblepot." One thug told Penguin.

"Good. Make sure it stays that way." The bird-like crime boss ordered.

"Got it." The thug confirmed, getting off the radio with Penguin and addressing the other thugs. "Listen up: the boss wants this place held up tight. No one in or out. If you see one of Joker's crew, waste 'em!" He ordered.

"What about Batman?" Another one said.

"Kill him, too." The first one said.

"Just like that?" The second one questioned.

"Just like that." The first confirmed.

"Well, good thing they didn't mention me." Yang said quietly as she snuck into the room through a vent and dropped down behind a thug, putting him in a chokehold and knocking him out. As she did this, however, she noticed a certain item around the thug's neck. "Oh, great. These guys have those stupid heart rate collars. Now I need to hurry on to the next guy before the alarm goes off." She grumbled, quickly and silently moving along behind the thug at the top of the stair on the second level to the far side of the room from where she entered.

From there, she grappled to the overhang above her to the one on the Northern wall, where three more thugs were in the side room there. The first two quickly ran out to check on the first fallen thug as his collar began to go off, but the last one took his time, walking slowly with his gun raised, passing under Yang and allowing her to perform an inverted takedown, dropping the thug from the overhang with a rope tied to his ankles connected to said overhang, leaving him to dangle several feet above the ground.

She then quickly grappled and swung to another overhang, then jumping down as the thugs ran to check on their hanging comrade, Yang pulling out her batclaw and firing at the thug in the back, reeling him in and clotheslining him, knocking him out and to the ground and rushing to the final thug as he turned and aimed at her, grabbing his gun and bringing it up to bash him in the chin, stunning him and allowing her to rip the gun from his grasp, spinning him around and slamming him against the wall, pulling and twisting his arm back, her free hand pressed against his elbow, poised to break it if he resisted. "Alright, buddy. Tell me where to find Freeze and I promise I won't be too cold to you." Yang joked, but kept a serious enough voice to tell the thug not to mess around.

"He's in the museum! Penguin's got him!" The thug informed.

"I'll have to cut that tongue out of your head, boy! I don't like people telling tales on me!" Penguin snapped.

"No! I'm sorry, Mr. Cobblepot! She made me tell her!" The thug pleaded.

"Yeah, come on, Ozzy! Give the guy a break!" Yang said, before bashing the guy's head against the wall to knock him out. "Never mind. I gave him one for you!" She taunted.

"You can have 'im, dragon girl. I'm safe and sound inside me Museum! Try and get me if you like." Penguin challenged.

"Oh, Penguin, big mistake. I take my challenges VERY seriously!" Yang warned him playfully, hurrying to the exit. "Batman, Penguin has Freeze at the Museum. I'm on my way there now." She informed the vigilante.

"Alright. I've wrapped up my investigation at the moment. I've got solid evidence, but not enough to find Deadshot. I hate to say it, but we may have to wait for him to strike again." Batman explained.

"We'll get him, Bats. Don't worry. Before tonight's over, Deadshot's gonna... Bite the bullet!" Yang joked, giggling a bit. "Eh? Am I right?" She asked, only to receive no answer. Batman had hung up on her. "Some people. No appreciation for humor." She said, shaking her head. She was about to exit the building, before the security doors came down as a massive explosion was heard and the entire building began to shake. "Well, that can't be good." She said, contacting a certain butler. "Uh... Hey, Alfred?" She asked.

"Yes, Ms. Xiao Long? Have you managed to retrieve the cure from Mr. Freeze?" He asked.

"Sorry, but no. Penguin's got him in the Museum, but I'm stuck in the old GCPD building." She explained.

"I don't wish to complain or sound impatient, but you do realize Master Bruce will actually die without this cure, don't you?" He asked.

"Don't worry, I'm on it. Anyway, I'm in a police building. Penguin probably bribed someone to get the codes for government structures. Think you can send me the unlock codes?" She asked.

"Sending them to you right now, Miss." He complied, downloading the codes to both her and Batman's devices.

"You're the best, Alfred!" Yang said with a smile. She then tracked the wires back to the security box and used her sequencer device to disable the security systems with the code "dissect". "Well, that was a pretty CUTTING-edge solution!" Yang joked once more as the security gates went up and she escaped the abandoned police station. She exited the building and got to the rooftop to see what had just occurred. "Whoa. Penguin's thugs blew up the bridge. He sealed off Joker's forces on this side of the city. Smart, but he also left his own thugs trapped with them. Not that he cares, though." She growled a bit, making her way to the Museum.

Soon enough, both of our heroes had arrived at the Museum, now on opposite sides of the front of the building, the entrance extension separating them as they looked down at the thugs in front of the stairs to said entrance. Yang leapt into action first, quite literally at that, jumping from her position and slamming down in between the handful of thugs, fist-first, recreating her fight in Junior's bar and first fight with Batman and creating a shockwave that launched them into the air, landing dazed on their backs, allowing Batman to jump in as well, throwing a batarang into each thug's head, knocking them all out.

Another thug came from behind each hero, Yang firing a round from Ember Celica at the one behind Batman as the dark knight fired his Batclaw at the one behind Yang, reeling him in and clotheslining him. "Good work finding Freeze." Batman complimented.

"No problem. It's the least I can do while you're solving assassinations while you're poisoned." She said. He nodded and the two made their way to the door, which was also sealed with an electronic lock. Batman used his sequencer on this one, decoding the unlock password: fossil. "Wow, they really need to update the codes around here..." Yang said with a growing smirk.

"Yang..." Batman warned.

"Because that one's ANCIENT!" She finished the pun, laughing at it as Batman could only groan before the two of them entered the building.

Once inside, they were met with two thugs wielding large knives. "This is Penguin's turf, freaks! We're gonna kill you for breaking in here!" The one in front snapped, rushing Batman as the one in the rear rushed Yang. Batman dodged his attacker's first two slashes, before blocking his arm on the third one, grabbing his head and smashing it against his knee to knock him out. Yang simply caught her attacker's blade between the spikes on her left gauntlet and twisted her arm to snap the blade, knocking the other thug out with a punch to the face.

"Too easy." Yang said, walking towards the entrance, only for metal bars to rise up in her path, sealing off the way to the lobby. "Or not..." She said in annoyance.

"There must be another electric lock somewhere." Batman said, diving through a window into a room on the right. Yang jumped through after this to discover Batman had found the lock and was using the sequencer to decode it, but saw it was being heavily distorted with static, before the letters moved out of the box with the image freezing.

"I don't think I want you and that lizard girl of yours breaking into my little home, Batman." Penguin taunted through the speakers.

"It's Dragon! Light Dragon!" Yang snapped.

Batman put a hand on her shoulder to calm her down and get her to focus. "Something's blocking communications back to the batcave. Penguin must be using military grade communication disruptors. The only way to crack this security is to destroy them." Batman said.

"Smashing stuff sounds good to me." Yang said.

Batman adjusted their scanners to track the devices. "It looks like there's one right on the roof." He said.

"And another one about a hundred meters away. I'll take care of that one." Yang said as they exited the building and leapt into action.

Batman quickly grappled up to the rooftop as Yang jumped off the edge into the lower city, before opening her cape and gliding a bit, grappling away into the distance. Batman reached the rooftop and saw the disruptor, which was being protected by 6 thugs that all stood in front of the device, admiring it and wondering what it did, obvious to Batman until one happened to turn, alerting the others as they all stumbled back in surprise and fear. Batman then rushed in and dispatched the thugs, approaching the device. "The jamming towers have 3 terminals attached. We'll need to destroy all 3 to shut them down." Batman explained to Yang as he drove his fist through the screens on the device, one after another.

Cut to Yang, who was now on a rooftop across from the second terminal. "Thanks for the tip!" She said, before jumping down and landing on a lone thug on a lower section of the roof. Another thug across from him heard this and turned to face her, but before he could take aim, she launched herself at him with Ember Celica and knocked himself out with a kick to the head, another thug jumping down from the upper level to shoot at her, but she easily brought her fist down on his head, knocking him out, then firing a round from Ember Celica to knock out the last thug rounding a corner and aiming at her. She then smashed the screens on the second disruptor. "So... I just smashed the last disruptor, but it looks like care devices are still out." She said, checking her sequencer.

"I just heard a group of thugs communicating with Penguin. Apparently, they have a third disruptor underground. Meet me back at the old, abandoned subway station." He instructed.

Yang groaned at this. "Oh, great. Because underground trains went so well the last time." She said, recalling the events of Mountain Glenn, after which her mother decided to send her to Gotham in the first place. Our heroes then made their way through the city and met up at the abandoned subway entrance Batman had stated for the to meet at. "How do these things even work underground?" Yang asked.

"They're military grade. Very powerful. Simple as that." Batman explained, before heading down the subway entrance, Yang following close behind. They then took out the two thugs guarding the tunnel to the subway trains, reaching the trains and heading down their tracks, finding a branching off path where three thugs were looking at a poster. They defeated these thugs quickly and continued to follow the signal, dropping down into a strange underground city, where they discovered five armed thugs guarding the final disruptor.

Dealing with the thugs was relatively simple enough, each hero took out one with an inverted takedown from a gargoyle as the thugs passed over the elevated walkways. Batman took out one as he patrolled the bridges connecting the two walkways, then one of the two thugs guarding the disruptor went to investigate the panic collar of his ally going off, Yang dropped down and took down the thug still guarding the device. The last one turned back upon hearing the collar of the comrade he just left, allowing Batman to drop down behind him and take him out as well. The vigilantes then regrouped by the machine, each punching out one screen on the left and right, before Batman punched out the remaining screen. "Well, that's the last of them!" Yang said with a pleased smile.

"Exactly. Now we can go after Cobblepot and get Freeze." Batman said, the two of them retracing their steps and rushing out of the subway station.

As they did, they heard Cobblepot's voice return over their hacked communications. "What the hell is happening down there? Hello! Is someone gonna answer me? I give you one simple task: stick up a couple of freaking machines. And what? You couldn't even get that right? I hope Batman and Light Dragon broke every bone in your stupid bodies. I hope you lie in there, desperately trying to breathe through fractured ribs and punctured lungs. And if you're not, you better summon whatever strength you've got left and run. 'Cause after I'm done with the bat and that blonde, you're all next!" He warned his unconscious thugs.

"Jeez, that guy has some anger issues." Yang said, a bit shocked at the harshness in those words.

"He's a psychopath and a monster who deserves to be in an asylum. But we'll deal with him soon enough." Batman said as they reached the Museum, where six more thugs were guarding the door. Batman leapt at the three to the right, moving between them and landing several quick and painful hits to them, knocking each of them down and taking them out on the ground as Yang engaged the three on the right, taking one down with an uppercut and the next one down with a spinning round kick to the head. The final thug had a car door as an impromptu shield, but Yang simply shot her fist through the door and into the thug's face, causing him to do a 180 and fall face-first to the ground, unconscious, with the door landing on top of him as one final insult to injury.

They then entered the Museum once again and Yang jumped through the window to the next room, using her sequencer to decode the unlock password... "Dinosaur? Really? They really need to change these, because this one..." She started.

"Yang. Don't you dare." Batman warned.

"This one Ex-stinks!" She finished, playing off the word "extinct".

"I swear, I'm hiding Hornet's keys when we get back." Batman said, thinking of places to hide the keys to Yang's new bike, Hornet, a Kawasaki Ninja, her stand-in for Bumblebee until she returned to Remnant.

"Oh, come on, Bats! No need to get so dino-SORE about my jokes!" She made another pun as they got back into the main hallway.

"Yang..." Batman growled as the blonde ran ahead of him.

"Oh, come on! Don't be such a grouch! Just think about how Penguin and his thugs are gonna get Tyrannosaurus WRECKED!" She joked one final time, turning back to Batman, unaware of something rise behind her.

"Yang!" Batman warned.

"Huh?" Yang questioned, turning around to see the dinosaur she'd just joked about, the T-Rex itself, rise up and lunge forward, jaws open, ready to snatch her up. "Aaaah!" She cried out, flinching and holding her arms up in defense, only to notice nothing happened. She opened her eyes and looked to see the T-Rex just sitting there with its jaws still wide open a few feet in front of her.

Batman chuckled at this. "It's only an animatronic." He told her, heading down the stairs past her.

"Well, obviously! I just wasn't ready for that!" She snapped, to which Batman chuckled a bit more. "Oh, come on! My puns get nothing, but me almost getting eaten gets a laugh out of you!? You're the worst!" She snapped, hurrying after him.

The two of them stopped at the stairs and saw three thugs beating one someone. Batman noticed the one doing the beating as the other two stood and watched was different from his comrades. "He's wearing body armor. I'll need to hit him with quick, focused attacks to penetrate his defenses." He analyzed.

Yang smirked at this. "Or you could just go for the head." She said, firing a round from Ember Celica, hitting the thug in the head and instantly knocking him out. The other two noticed the heroes and rushed up, but the heroes simply leapt from their spot on top of the stairs onto the thugs, knocking them out as well. "See? Easy." She said.

"You're getting too cocky. Watch it." He warned her as they walked up to the victim. "You're safe... For now." Batman told him.

"Thank god." The man said.

"I mean, pretty sure we did the saving here, but do what you want." Yang said.

"You might want to hold off on thanking Him until you've answered MY questions. Who are you?" Batman demanded.

"Sorry, man. I'm a cop. Gordon sent us in here. From the 13th Precinct. Part of the strike team. Been here since the beginning." The man explained.

"Okay, then. What's the code?" Yang asked.

"Exactly. If Gordon sent you, you'll know it." Batman confirmed.

"Oh, yeah! Yeah, he said... Oh, man. What was it?" He asked.

"The code. Now." Batman demanded.

"Better hurry. He's not in the best mood right now." Yang warned.

"It's... 'Sarah'! He said to tell you the code is 'Sarah'." The cop answered.

"You're safe, officer." Batman confirmed again.

"It's Jones, heroes. Elvis Jones." Jones introduced himself.

"Nice to meet you!" Yang greeted brightly, before realizing something. "Wait, if those thugs were beating you, they must've found out your cover. What about the rest of your squad?" She asked.

"Gordon always said he was planning on sending your team." Batman said.

"Yeah, he wanted to know what was going on in here. I guess we found out. There were ten of us. Hopefully, there still are." Jones said.

"Oh, man..." Yang said worriedly.

"I told Gordon it was too dangerous to send you in. Stay here. If the rest of your team is alive, we'll find them." Batman assured him.

"Well, looks like it's time to go be heroes!" Yang said as they took off.

A/N: Another chapter done! I hope you all enjoyed this and are also enjoying the other RWBY X Arkham stories by writers just as, if not more talented than I am. Also, please check out Pokemon Sun & Moon: Alolan Adventures by my good friend Damon Wolf Cub. It's a collab the two of us have worked on. Please check it out, as well as his other solo works. He's an amazing writer who makes great stories and with your support, he'll make more incredible stories and chapters to his existing stories in the future.