Author's Note

For all who were not reading the description fully. This is Sterlit's idea and I have his permission to write it! Sterlit even edited these chapters. I'm just saying this to make sure no one accuses me of stealing anothers idea. I like to be on the safe side here.

With that being said, this is the first chapter! No gangbang clop in here as this chapter is only there to set the scene for the real action that happens in the following chapter!

Like always is constructive criticism welcome! Enjoy!

The Genderswap Potion aka From Dragon to Dragoness

“Are you sure?” Twilight asked, causing Spike to roll his eyes.

“I’m sure Twilight. What could possibly go wrong?”

Twilight sneaked him one last worried glance before sighing and turning around to the door.

“Just be careful, okay?” she asked, looking at Spike over her shoulder. He simply rolled his eyes again as he waved her goodbye. A moment later the doors to the castle were finally closed.

After a few seconds, Spike fist bumped into the air. He finally had the whole castle for himself!

It was quite fortunate that Twilight had to do some official royal visit in Zebrica. A visit that will take her a whole week! A whole week being home alone in the castle! A week filled with reading comics, watching hoofball, and stuffing himself with gems and icecream!

He of course still got a list from Twilight detailing all of the work he had to do over the course of her absence, but that wasn’t really a problem. He was used to it as Twilight worked him to the bone since he learned to walk... Good times.

With melancholic sigh he unfurled the parchment to see what he had to do today.

His eyes wandered over the different points. It pretty much went from sorting books and potions to cleaning and doing laundry. So just a normal day.

He diligently walked to the basement, deciding to start the cleaning there. Especially since Twilight wasn’t home. She was always so touchy about him touching things down there, as if something terrible would happen. Sometimes she seemed to forget that he was her number one assistant. Not to mention that he had recently turned 18, so treating him like a kid really wasn't appropriate anymore. But it matters not since he was going to clean the basement without making any kind of mess! That would show Twilight that he was the most reliable assistant ever! Not to mention that he had to sort her potions out anyway, so he was bound to go down there sooner or later.

With that he grabbed a bottle of apple juice from the fridge an put it under his arm so that he could stay hydrated during his work, while holding a broom in the same claw and a bucket with a cloth in his other.

The door to the basement creaked ominously open, making Spike chuckle. Somethings seem to be the same in every home.

He then switched the light on and walked down to start his cleaning duty.

Spike hummed jovially as he took his time to clean up the basement.

Working tables as well as all kinds of machines adorned the room. A central table in the middle had all kinds of papers from one of Twilight's late night studying sessions on them.

He sighed. Twilight might have OCD, but once she was sleepy enough she still could get rather messy.

He set his bottle on the table before sorting through them and neatly stacking them on different piles. After that he started going through the potion racks of the surrounding tables, sorting them as best as he could. Problem here was that some of them weren't labeled correctly or labeled at all, so that he first let them stand there as he started to clean the rest of the room.

Over the course of his hard labour he drank again and again from his bottle, trying to quench his thirst among such short breaks.

The mess that this huge room represented was wearing him a bit down over time, especially how meticulous he had to treat Twilight's equipment and scientific machines, considering she would blow a gasket if anything broke down here. Nonetheless he was determined to get it done as soon as possible and check it off Twilight's checklist, so he pressed on.

Only thing that was blocking him at the end from actually wiping the remaining tables were the unlabeled bottles. With a huff he decided to stash them on the central table for now, so that he could finally get his work done. He could think about the bottles later.

Other than that he didn’t have any further problems.

After about almost one and a half hours of scrubbing he wiped the sweat of his brow before leaning with his back against the central table where the bottles stood on.

He lazily grabbed blindly behind himself for the bottle of apple juice. He didn’t even spend a thought on it as he randomly grabbed a bottle, completely forgetting about the bottles he had stashed temporarily on it. He quickly uncorked it and greedily gulped the potion down, before letting out a loud burp.

He snickered to himself as Twilight would scold him for burping if it wasn’t for the sake of Equestria.

After that he noticed a strange taste in his mouth. It certainly didn’t taste like the apple juice he remembered so he wondered if it had gone off.

He was just about to go to check the bottle when he suddenly felt his body temperature skyrocketing making him gasp out before he fell to the ground, writhing.

His entire body seemed to burn from the inside out as his flesh and bones seemed to move and rearrange themselves.

Spike could only whimper as his legs started to become less muscular and his purple scales got smoother. His pelvis seemed to get wider, as his butt became a bit larger and softer to the touch, while his shoulders lost in width to gain a more sleek appearance which also made him feel the jeans being more taut around it. Another burning in his loins was the only warning as his pride suddenly shrunk only to be replaced by a more feminine part as his innards made room for the perfect breeding tool. Spike’s facial features softened as his tongue seemed to lengthen. He let out a soft feminine whimper. Next was his tail which elongated slightly giving it an elegant appearance. Lastly, he could feel two points of heat located in his chest, points which quickly started to burn relentlessly as two soft, squishy mounds were forming on his chest. A pair of sensitive nipples were springing up as well as his new, impressive bust suddenly strained under the contraints of his shirt. The soft fabric rubbing against his newly formed nipples making him moan out as the pain faded and he tried to catch his breath on the floor.

It took about ten minutes until he managed to speak again.

“W-What?” he asked in a feminine voice making him ‘eep’ as he scrambled nervously to his feet, or her feet now.

As she looked her new self over she quickly noticed the plush mounts on her chest.

She nervously reached her hands up and touched them, fondling the big squishy mounds shortly and making her moan out, which actually snapped her out of it as realization dawned on her.

“I-I’m a dragoness…” she said dumbfounded before pulling her rather taut jeans down and indeed saw that her crotch area had changed.

Spike started to hyperventilate before remembering the weird taste of the apple juice. In panic she scrambled to the table only to see the bottle she had drunk out off was not the same as her apple juice.

In a short bout of panic she drank from the bottle with the strange liquid again, to hope it would change her back. It even developed the heat she felt the first time. But instead of turning her back, her breasts only started to grow a little bigger, eliciting another moan from the dragoness. Not to mention that she could feel a distinct heat between her legs, which made her rub them together.

After her plan so spectacularly failed she tried to think of her other options.

“The princesses will know what to do!” she exclaimed as she hastily scribbled a letter, hoping that she could help her in her situation.

With a burst of flame she went to sent the letter on her way, but was flabbergasted as she saw it burst completely into normal flames.

This was not good. The scroll burned, meaning her sending enchantment broke because of the potion! She had no way to contact the princesses to sort this out!

Maybe she could ask one of her other friends?

Spike immediately shook her head. This wouldn’t end well. If she would ask Twilight, she would never hear the end of it, not even considering that she was far out of reach now. Pinkie would probably throw her a genderswap party, Rainbow Dash would laugh her flank of, right alongside Applejack. Fluttershy would probably find it quite fascinating to have a petite female dragon around. And Rarity… She would probably dress her up and coo at her. The close proximity she would gain to her crush was rather enticing, but in the end she could never live with the embarrassment that would come with it.

If only she had a friend that might now more about dragons…

“Ember! She could maybe help me figure this out! I only have to get to the Dragon Lands and back before Twilight notices I’m gone!”

Spike’s mood brightened, this definitely was a brilliant plan.

She immediately tried to pull her jeans back on to make herself ready for the trip. Only it didn't seem to fit her now larger buttocks anymore. With frustration she kicked the jeans as well as the slightly tight undergarments off. This simply won’t do, she needed new clothes.

She hurriedly raided Twilight’s wardrobe, hoping that she wouldn’t find out about it. The last time Spike stumbled over her panties Twilight was furious.

Spike had to admit that it was embarrassing to actually wear mares clothes, but then again… she was a mare- er... dragoness, now.

With a sigh she grabbed some blue and white striped panties before putting them on. They seemed to fit perfectly, her bigger rump filling out all the right places. It was an evidence that Spike's body now resembled that of a young adult dragoness. A short black skirt followed.

Then came the awkward part: the bra. Spike didn’t want to wear one, but her breasts were bouncing around as she walked, which was quite annoying, so she put up with it and grabbed one before trying to figure out how to actually wear it.

A minute or two of trying and she managed to put it on. She grabbed her new breasts in both of her hands again to see if they were secure, which they were.

After that followed the last part of her new wardrobe, a white turtleneck sweater.

After she donned her clothes she twirled around as she stood in front of a mirror. She actually had to admit that she was quite hot.

A thought which immediately seemed to tingle her privates once again and Spike immediately cupped that area, tempted to let his scaly fingers wander into her carnal depths.

She shook herself out of it.

“What is wrong with me?” she asked herself before she rememberd the symptoms, causing a cold chill to go down her spine.

“A-Am I in heat?” she asked as a rosy blush crossed her cheeks.

It made sense from everything she had seen as the girls were in heat. That was only one more reason for her to end this quickly.

She was about to head out then a thought hit her.

How should she call herself?

If she was spotted, she didn’t want to admit her situation to anypony, so she needed a cover. A new identity, or at least a new name.

Her eyes wandered to the scales over her elongated and nervously twitching tail.

“Barb,” she said with a smile, having settled on a name.

With determination and a goal in mind she steeled her nerves before pushing the crystal doors open.

Nothing would stop her!