DISCLAIMER: I don't own Marvel, DC, or any associated characters or properties. I just write porn that uses those characters.

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Yes, you read that correctly. Marvel and DC. The least ambitious crossover event in FF history. This isn't my first go at Marvel, but it is my first go with X-Men as well as my first attempt with anything DC related. And this is a smutty one-shot between Beast from X-Men (one of my favourite X-Men) and Cheetah from DC. Not as knowledgeable on the latter, but she's got a great design and is an interesting character. This was a request by good friend Shepherdboy17, and it will contain strong sexual content and language, and all characters are at least 18 or over. If you're not old enough to read, if you're put off by this kind of thing, or if you just don't want to read, then feel free to skip this. Otherwise, I shall see you at the bottom.


In his laboratory at the X-Mansion, Hank McCoy was in his lab, tinkering with a large machine. Besides him, Jeam Grey was using her powers to lift parts of the machine while Sunfire used his own powers to weld the parts together.

"Are you sure that this is going to work, Hank?" Jean asked.

"I've ran through all of the data twenty times over and I've had some help from Charles as well," Hank replied. He then used his agility to leap up to one of the locks on the machine, making sure to tighten it. "It has to work this time."

"Just remember the objective, Hank," said Xavier in his mind. "Your goal is to travel to other universes where Cerebro has detected mutants."

"I'll get back to you when I'm done setting up," said Hank. "Jean, Shiro, thank you for your help."

"Best of luck, Hank," Shiro said. "The sooner you can find new mutants, the better."

"We'll keep things running on our end when you go through," Jean added.

Hank went over to a large computer and cracked his knuckles before typing, and the machine crackled to life with a buzz of metallic humming. He was thankful that it started, so now was the time to see if it would take him anywhere. He typed some more and a small purplish orb appeared in the middle of the machine, so he typed in the coordinates that Xavier had given him and, sure enough, the small orb expanded into a large circle, spinning slowly but not showing anything on the other side just yet.

"Should we test that it's safe first?" asked Jean.

"Throw one of my wrenches into the portal," Hank said.

Jean nodded and used her powers to lift a wrench, chucking it into the portal. A few seconds later and it was flung back, almost hitting Shiro in the head before Jean caught it. Shiro gave an appreciative nod at that before turning to Hank. "Looks like it works."

"I don't know how long I'll be gone, but if I wind up in any trouble, I'll let Charles know," Hank said, turning to Jean. "Or you."

"Best of luck," said Jean.

Hank nodded and walked up to the portal, putting an arm through, pausing before entering it fully. After he passed through it, he didn't realise that the portal had closed behind him, and he found himself in a strange area. He looked above himself to see some sunlight shining through the branches of tall trees, and he made the calculations that he was in a jungle or forest. He heard the sound of rushing water nearby, and he went to see a small waterfall. He went over to it and scooped some of the water with his hands, washing over his face with it and getting a taste of some of it as well.

"Hmm... very fresh... but not what I'm looking for..."

He turned around and was about to move deeper into the forest when he felt a weight crash onto his back suddenly, causing him to lurch face first before he got his feet underneath himself and sprung into a backwards roll, getting into a crouching stance to see a being that looked similar to him. Well, there were several key differences. First of all, the being that attacked him was notably female given her curvy. Secondly, she had dark yellow fur and black spots around her person along with an orange mane of hair. And third and finally, while Hank had at least worn something to cover his modesty, the woman before him had no such restraint and was baring all freely.

"Who are you, intruder?" she asked.

"My name is Henry McCoy," he said. "I'm looking for mutants to help a friend of mine. You wouldn't happen to be one, would you?"

"I am," the female said. "My powers are the result of a curse from a long time ago. My real name is Barbara Minerva. But you may call me Cheetah... as long as you tell me your name."

"I did," Hank said. "Henry McCoy."

"No..." Cheetah zipped over to him instantly. "Your true name..."

"I supposed that I am otherwise known as Beast," he admitted. "But I am here looking for people to support a cause. I'm afraid I can't waste much time. Would you be willing to help?"

Cheetah smirked. "Absolutely... but here's the thing." She cleared her throat as she slowly walked around him, taking in his physique. "Whenever I am turned into this form, I have a thirst for blood. But I've taken a serum that helps that feeling, so now, I have a different hunger..." She whispered in his ear. "I've hunted for the perfect lover for a long time, but they were all boys... you, though..." She inhaled. "You're a fucking man... and I want you to take me. If you fuck me... no, if you ruin me... I will consider joining you."

Beast couldn't hide his own growl. "You know, I myself am a man of science and diplomacy... but I can sense your heat, and, well... women typically don't go for large, blue, furry men. And unlike you, I can't transform back into a human. I am stuck like this."

Cheetah got in front of him and smiled. "And you are beautiful... and I want you to be mine and I want you to make me yours."

"Well, allow me to start," Beast replied. "I can smell your arousal... so I want to taste it..."

"Handsome, you can taste whatever part of me you want~" Cheetah purred.

Beast replied by pulling her close for a kiss, his tongue instantly pushing into her mouth and hers slipping out to match his. He used his size and strength to lift her up and she instinctively wrapped her legs around his body, her heels digging into his lower back and deepening the kiss as their tongues danced passionately, and she roamed her feet and hands around his body, taking the time to appreciate his muscular, large frame, her hands dancing over his biceps and her heels going over his glutes and thighs. In response, his hands roamed over her body as well, taking time to appreciate her curves, her athletic body, and especially her breasts, his hands soon digging into them and grasping them hard in an act that made her gasp out and push her body rougher against his.

He felt her pussy grinding against the crotch of his shorts, and she pulled at the sides of them with her toes, slowly sliding them down and breaking from the kiss to see his large cock, her eyes widening at the sheer size of it. 16 inches of meat... and she couldn't wait to feel all of it. But for now, she was enjoying the attention that he was paying to her body, and seeing as she broke the kiss herself, he was more than happy to latch his lips onto her neck, biting and sucking on it repeatedly in an effort to mark her, and she did the same for him as he carried her to a rock formation. He placed her onto her back and moved his lips from her collar down her shoulder and eventually to her breasts, bringing them together with his hands and assaulting both of her nipples at the same time with his tongue.

The archaeologist moaned and pushed her chest against the blue-furred mutant's face, his hands palming her tits as he kept kissing and sucking on the flesh of her nipples, groping them hard as her hands glided over to his. She kept his palms in place and opened her legs widely, and he kicked his shorts away as he slowly got onto his knees, his head nestling between her thighs as he looked up at her before he pushed his tongue out to delve deeply into her wet pussy. She moaned as he devoured her front hole eagerly, his hands continuing to roll her breasts around as he thrust his tongue deep into her wet entrance. She reached down and scratched the back of his head gently as she rolled her hips up, grinding her cunt against his face and panting as her legs began to shake.

He continued to devour her wet hole, hungrily lapping at her flowing juices before moving himself lower, pushing his tongue against her ass-hole. She moaned and raised her legs higher and he started to rim her anus, his tongue diving in deeply as he pushed his nose against her cunt, inhaling her scent and licking over both of her holes, making her breath shudder a bit while he also kept squeezing her tits, his fingers rolling her nipples and pinching them hard while he rimmed her. He licked over her ass and pussy, nuzzling between her legs and even growling as he tasted her as he licked her harder, focused fully on tasting her ass and licking faster as she started to cum, spraying over his face as he licked her ass through an orgasm, her feet resting on his back as he made her cum.

"Holy... shit..." Cheetah panted as she came down from her high, soon yelping as Beast squished her tits more. "You like playing with them, hmm~?"

"I... sort of have a thing for beautiful tits..." Beast admitted. "And yours are amazing. Large, full, firm... and you don't seem to mind me playing with them."

"Hmm, not at all~" Cheetah smirked. "And I'd like to repay the favour for you making me cum so much." She growled and hopped over his back, getting behind him suddenly. "My turn to taste you now..."

Before Beast could register what Cheetah was doing, he felt something warm and slimy press against his rim, and he grunted as she began to lick around the inside of his rim, her hands pushing his legs aside so that she could get to his cock. She reached her right hand around to stroke his shaft as her left cradled his balls, and she moved her tongue down to suck on is sack as well, going over that and his ass repeatedly, moaning against his hole and making her tongue vibrate as she stroked him harder, her hand going up to his tip and making her smile. She felt some pre-cum pearling at the head of his cock, and she stroked him more as she rimmed him harder and faster, her hands pumping more before she grabbed his cock and aimed it downwards, holding it in place.

She moved her tits to trap his large pole and started to stroke his shaft up and down, alternating from her left breast to her right one, her mounds swiping over his shaft as she licked around the rim of his ass, spitting on it and giggling as he reached behind for her. She was eager to lick at his ass-hole as she kept moving her body up and down to stroke his cock with her tits, his meat stroking against her flesh with repeated motions, her lips smooching his muscular buns and licking against his crack before she slowly pulled away. His cock popped out from between her breasts as she grabbed his hips and turned him around, the head of his penis swatting against her left cheek before she lifted his cock to push it against his torso, leaning her nose against his balls.

"Mmpf, fuck..." Cheetah panted, licking and sniffing the blue-furred mutant's testicles. "You smell amazing... so full of cum... and I can't wait to suck your cock and get it all out of you~" She stuck her tongue out to lick around his orbs, going lower to taste his ass a bit as well, her mouth grinding against it over and over before licking a long line up to the tip. "You're so fucking big, Beast... and I want to feel it... I want every massive inch in all of my holes. I want you to fuck me until I can't walk straight. And I want you to let all that cum go because I know that you've got a lot more for me... so do it. Cum down my mouth and all over my tits and face that you love so much, then mount me however you want like the slut that I am for you~"

She wrapped her lips around the head of his cock and brought her breasts around it again, stroking his shaft hard with them as her mouth enveloped the head of his cock, and she closed her eyes and slowly moved down to take his shaft in and started to bob her head. She gathered a lot of spit in her mouth and made sure to apply it to the blowjob, making it sloppier as she kept sucking him and jerking him with her breasts, his hands going down to grab them and hold them in place as he began to thrust against her. He felt his leg start to shake as he unleashed a load of his cum, his seed spurting out and staining her tits and face before she sealed her lips around his pulsing pole, swallowing a copious amount of his cum and her eyes going wide as she kept swallowing.

Beast growled and grabbed her head, pulling the yellow-furred mutant's mouth down more on his cock. "Oh my fuck..." He shuddered as he came down her throat and on her tongue, his orgasm eventually fading but his cock remaining hard. "That was great..."

Cheetah held still and made sure to swallow all of his seed before pulling her mouth off of his shaft. "I felt like it was a good way to repay you for how much you made me cum~"

"I think you might have overcompensated," Beast chuckled a bit. "But... I am going to fuck you properly now..."

"Not until I clean myself off, darling~" Cheetah smiled, walking past him and stroking his chest on the way to the waterfall. "Feel free to join me too. You can shower with me or... well, do whatever you desire~"

Beast growled and watched as Cheetah washed herself in the waterfall, and he wasted no time in getting behind her and sliding his cock against her pussy lips from behind. "I haven't had sex in some time myself... so don't expect me to go easy on you..."

"If you're going to fuck me like an animal, do it~" Cheetah grinned. "I want it. I want you to fucking ruin my cunt. I want you to slam into me hard and make me cum so hard that I can't even breathe... and nothing is off the table. You can be as rough as you want with me~"

Beast leaned and kissed Cheetah's neck, sinking his teeth in and enjoying her growl as he started to move back and forth, his pace going slow as he kept grinding his cock against her pussy lips before he grabbed his cock and slid it into her. She rolled her head back at how deep he sunk in, her right hand going up to turn his head to kiss him deeply as he started fucking her roughly, his hands roaming up her curvy body and settling on her breasts, groping them and slapping them together which got a yelp of surprise from her. He repeated the action a bit before pinching her nipples as their tongues met, their mouths and noses practically crushed together as his rough thrusting started to drag an orgasm out of her, her cunt juices dripping over his invading pole as she came.

He slowly pulled himself back, keeping the first few inches of his cock inside of her before slipping himself back in, her pussy a warm sheathe around his thick pole as he started to pound her again while he grabbed the back of her head. He guided her over to the waterfall as he pounded her, the water washing over their silhouettes as he slammed into her pussy over and over, his cock sliding in deeper with each thrust as she yelped out in pleasure, her legs shaking as she started to cum again. She clawed at the rock wall in front of her, but she was surprised at having her face pressed against it as he pounded her rougher, his other hand going to her ass and spanking her as she slid her hips back against his, riding out her orgasm as he squeezed her toned ass.

He guided the head of his cock away from her pussy and slid it up to her ass-hole, and she moaned as the round head of his large tool pushed against her back door. She took a deep breath before spreading her ass cheeks, exposing her hole, and he slowly slipped the head of his cock into her rear end, making her growl and pant out as he carefully pushed into her tight brown hole. He popped the head in as well as a few inches of his cock, and he let her do the work, her hips slowly falling back against him and moving forwards, the water as well as her movements helping her to take more of his meat in with each thrust before she gripped the wall and stuck her ass out, shaking it and making him chuckle as he got the hint and started to move his own body behind her.

He began pounding deeper into her, his hands groping her breasts from behind as he started a steady pace of rutting into her, making her eyes roll while he continued to slam into her ass, his hands pinching her nipples as she turned to kiss him. Their tongues met once more as he kept pounding into her, and she continued to claw and grab at the rock wall of the water fall as he kept pushing into her ass-hole while she reached down to rub her pussy, strumming along her clit as she felt another orgasm on the way. She soon met her release and came hard, bringing her hand up to his mouth so that they could taste her liquids together while he sped up his thrusting, dragging more of her juices out of her as her legs shook before he turned her around and lifted her up.

Before she could react to him, he lifted her high onto his shoulders, and her legs instinctively wrapping around his head as he ate her pussy deeply, his tongue pushing deeply into her as his hands roamed around her thighs and ass, squeezing the flesh there as he touched her. He pulled her against his mouth as she ground her hips up against his face, the juices from her previous orgasm staining his visage before he removed her legs from his head and pulled her down to wrap her hips around him, pushing her back against the wall as the tip of his cock poked against her wet entrance. She didn't waste any time in reaching for his massive rod and pulling it into her own pussy, her eyes rolling back and her hands starting to claw at his back as he began pounding her hard and deep.

"Ugh, fuck yes~! YES~!" Cheetah panted as her lover fucked her harder and faster, her legs beginning to shake as his relentless pace and thrusting made her juices splash against his body. "Fucking hell, you're... such an animal~"

"I go go by Beast, after all," Beast replied with a smug smile as he doubled his efforts, making her orgasm last longer before pulling himself back. "Taste yourself from my cock..."

"I'll get there, handsome~" Cheetah replied. "Just let me take care of you for now."

She leaned to kiss along the blue mutant's chest, licking the water from around his pectorals and muscles as she stroked her hands up his abs and brought her tail from behind her back to wrap it around his cock. She stroked his shaft softly with it and kept kissing him as she felt him throbbing, her hands caressing over his arms and biceps before she leaned to kiss his muscles as well, even taking in some of his scent as her tail continued to stroke his dick before she pulled it away and slowly descended to her knees. She kissed his chest and abs as she began to kneel down, her tongue trailing over his muscles lovingly before she reached for his hands, pulling him down with her so that they were both kneeling and kissing each other as she slowly pushed him onto his back.

She smiled and sat back as she lifted his feet up, kissing over them and moaning as she worshipped them while bringing her legs up around to stroke her feet along his chest, and he grabbed her calves and pulled her legs up so that he could kiss her feet in return. The two moaned at the mutual worship, with him rubbing against her soles and eliciting a moan from her as she did the same, the two massaging and kissing each other's feet before she moved hers back under herself to get in a better position. She kept sucking along his soles before lifting his legs up high and kissing down the back of his calf, then knee, then the thigh before reaching his ass and pushing her face against his hole, deeply rimming him and moaning as she brought her hands up to stroke him hard.

She kept working her hands over his shaft as she licked his ass before he planted his feet either side of her and flipped himself around underneath her, using his skill and acrobatics to put her on top of him while she kept licking his ass and stroking his penis. She wasn't caught off guard by it, and she growled hungrily at his show of strength before his hands reached for her head, making her drag her tongue along his balls and up his shaft before she started to take it down her mouth again, his hands moving from her head to her ass cheeks. He pulled her down and pushed his tongue deep into her pussy from beneath, making her moan and shake her hips against his face as he ate her out, his hands groping her toned buttocks as he tongued her wet entrance.

The archaeologist let out a moan as she was eaten out so deeply by her lover, sitting her pussy down on his face and grinding back and forth as she was devoured while she kept stroking his cock, spitting on it and rubbing the saliva in with her hands before she planted her hands on his thighs, opening her mouth wide and moving her head slowly down. She took a few bobs on his cock and slowly took more into her throat, repeating the action until she had about three quarters of his meat in her mouth, feeling satisfied with herself as she sucked him deeply before moving her head back up and blowing him at a more steady pace, his hips moving and making his cock thrust against her throat as she spat around his shaft, happily sucking him and moaning more.

Her own legs shook a bit as he kept eating her out, going from her pussy to her ass and back, repeating the process before bringing his hands to her holes, starting to finger them and making her pant as she arched her back while he finger-fucked her. It had the desired effect of making her spray her juices over his hands, and he hungrily drank them down as he pushed her off of his cock and onto all fours, mounting here from behind and pushed his cock against her anal hole. She panted and threw her hips back against him impatiently, and he started to plough into her roughly, her arms crossing under her head so that she could rest her chin on them as she took his pounding, his hips swinging back and ramming forth deeply, sending his cock hard into her ass.

She growled as he fucked her harder and faster from behind, reaching to place a hand on his right him as he shifted his angle to fuck her deeper, lifting his right foot and planting it on the ground next to her as he knelt on his left knee. The position allowed him to keep ramming deeper into her, and he gave her a few more thrusts as she started to cum, her pussy beginning to leak as he continued to thrust into her, making her growl out more as his fucking made her cum hard. Her pussy sprayed onto the floor beneath them, and as she came, he doubled his efforts, making her yelp out as her cunt kept leaking from his thrusting, giving her a few more rams before pulling out and slipping himself into her pussy, his hands resting on here hips as he moved.

"Oh, fuck, yes yeee-heeee-heeees!" Cheetah moaned as Beast's thrusts picked up speed, moving his right foot to the back of her head as he kept ramming her, his skin slapping with hers more as he soon dragged an orgasm out of her. She threw her hips back against his as she felt her pussy eject her juices, and he kept pounding into her rougher. "Yes, fucking hell, I love what an animal you are... such a perfect mate for me... making me your bitch and turning my holes inside out~"

"I'd apologise for not holding back, but you seem to be liking it," Beast said, slowing his pace a bit and slapping her ass before sitting back and pulling her on top, sliding his cock easily into her ass-hole. "Let's see how much more of me you can take..."

Cheetah gasped and panted as Beast started to ram into her ass repeatedly from beneath, his hips moving fast as his cock slammed into her ass hard, his thighs smacking against hers repeatedly as his thrusting drove an orgasm out of her. Her legs began to shake as she came, her entrance expelling her orgasm across her legs as well as his, and he kept thrusting into her ass as she planted her hands on his calves and started to bounce her body on top of him, shaking her hips as his cock was still buried up her ass. He grabbed her hips and pulled her ass down, the effect making her take more of his cock before he let go of her, watching and chuckling as she shook her own ass on top of him, continuing to take him up her ass before she sat up and grabbed his cock.

She pushed him into her pussy and slid herself down on him, but before she could start to move, he grabbed her and spun her around slowly, making sure that she could feel all of his cock inside of her as he turned her around. He then sat up with her, her legs wrapping around him as he started to pound into her while his hands rested on the small of her back, lifting here and pushing her so that she was laying down with him on top of her. He ground his cock softly and teasingly against her pussy as her legs stayed locked around his waist, and he put his hands on her breasts as he started to slam into her, giving her a few rough slams in a row before doubling his efforts, his pace picking up as she wrapped her arms around him and pulled him for a kiss, licking up the side of his face and to his ear.

"Cum inside me, Beast... I want you to knock me up... fill my holes with your perfect sperm~"

"I will... you feel amazing..." He kissed her neck and groaned as she sunk his teeth into his shoulder. "Fuck..." He huffed and growled as he slid himself into her repeatedly, his toes planted on the ground beneath him as he continued to fuck her while he kept going, his balls starting to tighten as her cunt clenched in orgasm, and he grunted and let out a curse as a torrent of cum spilled out of his cock and into her cunt. He held still for a few moments before pulling out and sliding himself into her ass, firing some of his cum up there as well before he collapsed, his body resting against hers as they panted from their mutual climax. "You felt... amazing..."

"And you were... perfect..." Cheetah said, blushing. "I have... something to admit."

"What is it?" Beast asked as he laid beside her, pulling her on top of him.

"I don't suppose there's a better time to say it, but for a long time, I've wanted a... a true love. A soulmate. I never had one, and most men were too scared or dismissed me when I turned. Or they couldn't keep up with me like you can." She sighed. "I... I always wanted a soulmate. A true love. And I think that you might be the one. You're strong and smart and amazing in bed... and given that you want me to join a group full of others like me, you know good people as well." She nodded. "I will join you... Hank."

"I think I prefer Beast," Beast said. "And... I feel the same. You're incredible with a strong heart. I just wonder if you're willing to use your powers for the right purpose. But that aside... it would be nice to have someone. I did used to when I was human, but that was a long time ago. And from how you've reacted to me as me... it's nice to have that."

Cheetah smiled and leaned to kiss him tenderly. "So... how are you going to get back home?"

"I taught the others instructions to open the portal in case we need it," Beast said. "But until then... we can spend as much time along as we'd like."

Cheetah purred, climbing onto him before he flipped her onto her back, and she giggled. "I like the sound of that~"


And with all of that, I hope you enjoyed this smutty one-shot. I liked writing it, and I'll be taking the rest of the year off of writing because it's the end of the year and I need a rest. But when the new year starts, I hope to pick up where I left off with more one-shots, a Cyber Riders chapter, and who knows what else on the way. Until then, take care, stay tuned, and Happy Holidays!