Twilight Sparkle opens the doors to her castle with her friends after enjoying a girls day out in Yakyakistan, wanting to rest from the long train ride home. What her and her friends see is something they never would’ve imagined seeing ever, Discord playing their role playing game with Big Macintosh and Spike, costume and all. Discord had wavy blonde hair and an olive green jacket and was armed with a bow and arrow; Spike was dressed as a wizard with turquoise blue hat and jacket with a sporting gray beard and staff; Big Mac dressed like a warrior with black armor on his body and helmet with curved horns on his head along with a unicorn’s horn. Some of the mares look perplexed about what was acting out in front of them, but watch them defeat several villains. “Uh, you think we should just… leave them be and let them continue their game?” Twilight suggests to her friends, not wanting to disturb their game.
"Are you kidding Twilight?" Rainbow Dash says as she drops her bags on the floor beside her and flies up into the air. "That actually really looks like fun!”
“Yeah! Whatever it is they’re playing, I want in!” Pinkie giggles and bounces excitedly in place, sharing the same enthusiasm as Rainbow.
Rainbow flies down and smiles at Pinkie and then the two rush forward and after crossing the threshold of Discord's magic spell, the two appear in outfits that they were suited for. Rainbow dressed in green loose fitting pants with a green colored cloak that allowed her wings to poke out of the back through two cuts in the fabric.
“Awesome Dash!” the pink pony says as she crosses to where Dash was, observing her new outfit; a turquoise/goldenrod striped outfit on one portion of it with the other half being goldenrod, a matching striped hat with two gold leaves on top complete the outfit. “Sweet! I don’t know what I am, but it’s awesome!” she excitedly says.
"I know! Me too!" Rainbow says as she rears back on her rear hooves to look over the change of her outfit and realizes that her voice was ever so slightly muffled by a piece of cloth that was covering her muzzle, almost adding to her mystery and stealth factors as she and Pinkie hug each other happily.
“Ah, it seems you two have decided to join us on this most epic of quests on Guys Night Out I see…” Discord says to the two new ponies in outfits, seeing Pinkie and Rainbow in costume.
"Of course! Why not? This actually looks really awesome!" Dash says as she turns her head to address Discord's comment toward them both.
“It would be nice if you could join us… but I’m afraid you two can’t…” he says with a bit of disappointment in his voice.
"Oh come on! Why not?!" Dash asks as she gives Pinkie a little bot of a tighter hug from the disappointment.
“Yeah Discord, why be a party pooper? That’s no fun to be one.” Pinkie asks him.
“Well…” he starts out but stops mid sentence.
"We'll do anything to play with you guys!" Pinkie says as she hugs Dash back and gives the archer Discord her best puppy dog eyes.
“Well…” he says again before thinking of the words to say. “…you two aren’t stallions and mares aren’t allowed for Guy's Night, that’s why.”
“What?! We really want to play with you guys!" Dash says as she glares at the draconequs.
“But you two have to be stallions in order to play with us though. But you two being mares and all… that’s kind of hard to accomplish… you know…” Discord replies hesitantly.
"We know it's not that hard for you to do what you want," Pinkie says as she gives him a smirk. "Especially for something like yourself.”
“You can like, do ANYTHING with a snap of your fingers!” Rainbow Dash interjects. “Can’t you do something about that?”
"Yeah Discord! You can do something for us!”
"Hmmm, let me do this..." Discord says, muttering something softly.
"Hey Pinkie? Wouldn't it be be funny if he actually made us stallions?" Dash snickers to herself.
“Uh huh, but too bad Discord won't do that. Maybe he's too scared to do that!" Pinkie giggles and then hugs Dash and giggles loudly.
Rainbow bursts out in laughter and hugs her nearby friend, thinking that idea would be too ludicrous for him to pull off.
“Careful what you wish for girls…” Discord says with a sly grin and snaps his fingers. Moments later, Twilight and the others let out a collective gasp. Rainbow feels something rub against her. “Uh… Pinkie?” she asks with a dumbstruck look on her face.
"Y-Yeah Dash?" Pinkie asks as she feels something pushing against something that felt attached to her and was throbbing gently.
“I-Is that your leg… brushing against me?”
"I th-thought that was yours..." Pinkie says softly in a silent panic as she bites her bottom lip gently.

Rainbow’s heart begins to beat faster and faster, feeling something throbbing attached to her which wasn’t her legs. She slowly looks between herself and Pinkie and gasps to see a fully hard and erect stallion cock, immediately blushing a deep red.
Pinkie looks down and then gasps loudly as she sees a hard stallion cock resting neatly in place as if she was a true stallion and sees the first few inches of her own touching Rainbow’s.
“W-We’re…”
"We're both stallions!" Pinkie says in a shocked and deeper voice as she, now he, pushes back and stands on his own rear legs as he moves his body a little wondering if Discord had just put them in an illusion. "Our voices! They're... deeper!"
"They are!?" Rainbow gasps, covering her, or now, his muzzle. "They are!"
Discord then bursts out in laughter and chuckles hardily, loving the expressions on their faces. “Hahaha! Oh this is too funny! You two should see the look on your faces! They’re priceless! Hahaha!” He bounces on his tail and continues to laugh.
“S-Shut up Discord! This isn’t funny!” Rainbow says, trying to hide his new erect stallion cock with a deep blush on his face.
"Take a look for yourself!" Discord says and snaps his fingers as a mirror appears in front of the two, now former mares. "Why don't you look at your new... additions now?"
Rainbow and Pinkie hesitantly look at the mirrors in front of them and see that their frames have changed, besides their hardware and their lower voices. They noticed that their frames were more muscular and more broad as compared to a thinner, more feminine frame of a mare. They each lift a leg and look at their erect stallion cocks and notice that their pussies were now replaced by a pair of hanging orbs, full of potent stallion seed. "This can't be real!" Pinkie says, dumbstruck, looking at his new cock.
"Believe it, it's real you two!" Discord chuckles hardily, loving the reaction of the two ponies and their... temporary sex change.
"DISCORD!" Rainbow says angrily after he is done looking at his new "hardware."
"What ever could you want Rainbow Dash?" he asks with a smirk on his face, letting a snicker escape his lips as he snaps his fingers, seeing the mirrors disappear into thin air.
"This ISN'T what we had in mind when we said we wanted to play with you guys!"
"Oh? I thought you said," He says and with a snap of his fingers turns his head into Rainbow's and in her mare's voice, replies. "'Come on Discord! We'll do anything to play with you all!’”
“I… But… How…?!” the Pegasus replies, frustrated as his own words were used against him.
Discord's head returns to his normal one in a flash of light and smiles. "But hey, now you two can really play with us guys.”
“Fuck! I hate it when my words are used against me!" he snorts, biting his lower lip, talking quietly to Pinkie. "This is so embarrassing...”
"You're telling me Dashie?!" Pinkie asks with his typical over-the-top way and bites his bottom lip as he looks down at his cock and blushes a dark red as the two mares, now stallions, were being completely embarrassed in front of their friends, especially the white mare who licks her lips for the view in front of her.
------------------------------------------
Fiction Name : No Girls Allowed in Guy's Night
Charactere : Mane 6 , Discord , Spike , Big McIntosh
Illustration and Story Idea : Loveless Nova (Me)
Write by :https://www.fimfiction.net/user/Warfire+Writing+Studios
Plot :
After seeing Discord join Big Mac and Spike for Guy's Night, Pinkie Pie and Rainbow Dash want to join in on their fun. But Discord doesn't allow them for one specific reason. After hearing their arguments for a moment, he devises a way to allow them to participate in Guy's Night. However, this "way" leads to some... unexpected actions by everypony present.