"Hmmm..." Poison Ivy smirked, a sinister idea coming to mind.
"I've been so lonely in this place all by myself, y'know?" Ivy paced away from the restrained vigilante. Her hips swayed as she returned to her floral throne. Crossing one leg over the other, the vines brought Jason closer to her.
"My babies keep me company, sure, but they don't exactly hold a conversation."
The unhinged botanist tickled the chin of one of her overgrown flytraps.
"You'll have plenty of friends to talk to back at Arkham. I heard orange is in this season." Jason quipped.
"Oh, so you have a sense of humor?" Ivy only smiled more, which made Jason scrunch his brow.
"You're perfect!"
"Perfect..?"
Jason didn't get that a lot.
"Perfect for my little experiment."
Ivy tilted her head, waving at the plants. They held him firmly in place by his ankles and wrists.
"Experiment? What experiment?!"
"Hold still!"
Ivy arose from her throne and headed over to her lab desk. Science papers, pens, and various vials were scattered here and there. She ran her hands through her vials and stopped when a green canister caught her eye. She smiled widely when she read the label. She sashayed back over to the vigilante, canister in hand.
"What's that?" Jason worriedly snapped to her palm. She held an all too familiar looking can of horrid gas. Already he started to have terrible flashbacks from fighting the Joker.
Ivy popped the seal off and tossed it to the floor. Toxic green gas spewed out, the canister rolling to Jason's feet. He gagged on the green smoke as it infiltrated his lungs. He tugged on the vines holding his hands and feet into place but to no avail. Unwillingly, he started to smile big and wide with horror in his eyes.
"What the hell, Ivy! Hahaha! Why do you have Joker gas?! Hahahaha!"
"You'll see..." Ivy returned to her throne and observed patiently. She held out a wine glass and one of her plants filled it for her.
"What's hahaha... What's that supposed to mean?!"
Jason struggled but he remained held back by the vines. What were they made of, steel? His vision became distorted and he felt ill. As the effects of the gas ran through his veins, a stray vine wrapped around his midsection and hugged him tighter and tighter.
"Your... your plan is to... hahaha... crush me to death..?"
Jason barely managed to even get that out, panting for air between forced laughs. Why bother gassing him if she just wanted to crush him?
The vine tightened around his stomach, the muscle mass eroding. His well defined abs had shrank down to a flat stomach. The vine helped guide the mass elsewhere, coiling around his ass cheeks and padding them out generously. All the while more vines paid attention to his thighs. His pants no longer fit and fell down to his knees, even his boxers barely able to stay on.
"No, not crush you to death, hon'. I did think about it, though."
SNAP!
Jason grunted, his hips popping outward as his waist continued to shrink. His hips curved out, accentuating his butt and thighs. The vines and the humid air inside the greenhouse only served to make him sweat profusely. Stray body hair leaked off of his skin along with any unneeded mass.
"Wh-what are you.. hahahaha... doing to me?!" Am I shrinking?"
The vigilante struggled, his face reddening at the realization his pants had fallen down. They fit perfectly fine a minute ago!
Jason prided himself in not being afraid of the worst Gotham had to offer, but in that moment he felt fear again. The same fear he felt the night the Joker took his life. If she wasn't killing him, then what did she inject him with? Red Hood knew Ivy was a cold blooded murderer. His years with Batman taught him that much about her. If she wanted him dead, she could have just snapped his neck when she first had him ensnared.
"I'll give you a hint..." Ivy giggled, noticing his lower body was coming along very nicely.
"It's not Joker gas."
She smirked knowingly.
"It's hahahaha! It's not?!"
Jason shot a wide eyed gaze.
"What is it?!"
Suddenly, the extra vine ran up his flat midsection and curved around his pecs, the muscle having been drained from them entirely.
SNAP! SNAP!
The vine assisted his spine and shoulders to snap inward. Jason let out a pained holler but it was followed by his own psychotic laughter. He watched as the vine removed his jacket and body armor, a second vine joining it as they both coiled around his now sensitive nipples. The two vines curled around his former pecs and started massaging the tissue. He found himself groaning but not out of pain this time. Between laughs he cooed to the odd sensation, watching with horror in his eyes as fat began to build up in his chest. Two mounds of flesh began to protrude. Once he saw the flesh sacks resting on his torso and only getting larger by the second, he fought even harder than before to break free. But it was no use. Succumbing to the forced pleasure, he rolled his head back, the feeling only growing stronger.
"Hahaha!"
Jason could only let out laughs in between disgruntled moans. With each laugh, his voice raised in pitch. His Adam's Apple melted away, his facial features softening to be more delicate and feminine. The gas's effects continued to sink their way into his very DNA. The chemical weapon now seeking to forcibly alter his chromosomes from XY to XX.
"Hahahaha!"
Jason frowned, helpless as his voice raised in pitch as high as it would go. His laughs now sounded oddly familiar, though they weren't his own. He knew he heard that laughter before but he couldn't put his finger on it as to where. He tried to think but it was hard with the pleasure and the laughter. His brain was clouded. However, he knew one thing for certain: whatever Ivy was doing, it was making him... female?
"I can see the gears turning from here."
Ivy spoke up, arising to approach him.
"Just in case you haven't figured it out yet, it's not Joker gas."
She got up close to Jason and whispered in his ear.
"It's Harley gas."
Jason tried to speak but could only laugh like it was funny. Harley? She was turning him into Harley?! There was a million questions he wanted to verbalize but couldn't. While his breasts finished developing, another vine coiled around his member and he groaned into another fit of laughter. Slowly, the vine shoved Jason's manhood back up inside of him like his skin was playdough. Ivy looked him in his changing eyes while his face rearranged itself to look exactly like her blonde friend. His lips reddened, black mascara on his eyes with pink and blue eyeshadow, his hair longer and in pigtails, having turned bleach blonde with pink and blue highlights. She wrapped her hand around his member to assist the vine, which made him shiver, let out a loud moan in her Harleyized voice. What remained of Jason Todd was erased as his dick and sperm cells vanished inside his newly grown ovaries. Only Harley Quinn remained.
The laughing gas started to wear off. The canister had been depleted for some time now. Jason let out an unwilling chuckle here and there but she was capable of speech.
"What did you do to me, Red?!"
No longer did Red Hood stand there but instead a naked Harley Quinn. She frowned, realizing she was calling Poison Ivy by the same nickname Harley used. She didn't even think to do it, it just came naturally.
"Isn't it obvious?"
Ivy whispered as she came closer, her breath hitting the blonde's lips. Her hand pressing against "Harley's" new entrance. She squeezed her thighs together, growing warm with anticipation. Jason wanted to resist her but Ivy's pheromones but it was no good. Harley's body made her feel inclined to be attracted to the redhead, pheromones or not.
Ivy closed the distance and pressed her lips firmly against Jason's, two of her fingers slipping passed her entrance and rubbing gently against her walls. The Harleyized vigilante squeaked and her moans were muffled by the kisses she received. Ivy's other hand ran its way up to her breast and played with it a little. By the time she pulled away, Jason was left sitting there with a strange mixture of panic and lust in her eyes. In her mind she knew she needed to escape but her body's needs made that idea seem impossible.
"I made you Harley."
Ivy stated the obvious.
"W-why...?" Jason forced that much out, her face redder than her hood.
"Oh... Harley came crying to me about how that clown doesn't love her, about how much she doesn't want to be with him anymore, yadayda..."
Ivy seemed annoyed even bringing it up.
"I tell her to break up with him, he's no good for her, and all that. I finally tell her how I feel about her and she runs back to him the first chance she gets?"
She shook her head.
"No. If I can't have her, I figured I'd have the next best thing."
Ivy smiled at Jason, holding her chin gently. This was all really over Harley running back to Joker?
"So I reverse engineered one of the Joker's canisters, did some DNA splicing with Harley's samples, and voila!"
She gestured to Jason's body.
"Perfect match."
"Why me...?"
"Honestly, I was just going to use it on some random woman off the street, but when you came in here I figured I'd try it out on you. I was curious to see if it was strong enough to reverse someone's gender..." she looked down at Jason's crotch.
"Clearly it was. Though... maybe I used too much estrogen? You're a little bustier than Harley is..." she gave Jason a quick squeeze which made her whimper.
"W-what do you plan to do with me..?"
Jason tried to sound serious but it wasn't coming out that way with Harley's accent.
"Hmmm... I think..."