Yara Flor, aka Wonder Girl III

Tim furrowed his brows, holding the costume that Wonder Woman abruptly handed him. He looked it over, his concern growing by the second. His face reddened slightly when he noticed the suit was basically an armored leotard with built in metal bra cups.

"Um... Wonder Woman, I hate to be Captain Obvious here but I don't think this'll fit. It looks like it's...."

"Made for a woman? That's the point. Circe has taken over the minds of the Amazons on Themyscira and claims to be the rightful ruler of my people. She has put a bounty on my head and I can't get anywhere near the island without her suspecting an attack."

Diana finally laid it out for him.

"But why do I have to dress like an Amazon..?"

Tim held the armor out in front of himself cautiously.

"You're going to pretend to be one of my brainwashed sisters bringing me in to face Circe's judgement. Only by you assuming the role of an Amazon can we make this work. It's more believable that Yara took me down than one of Themyscira's ordinary citizens."

"But I don't see how this will be convincing at all. I mean, I'll just look like me in a girl's armor suit, won't I? I'm pretty sure your people will figure me out on the spot..."

"That's enough, Tim. Time is of the essence. Just put it on and everything will make sense."

Tim exhaled, glancing between the suit and Wonder Woman. As much as he didn't want to put it on, lives were at stake, right? Besides, he was sitting around whining about no one taking him seriously as a hero. Maybe this was just what he needed? A heroic feat such as saving Themyscira would be a good start.

"Okay, okay... I'll... put the armor on."

He didn't have much of a choice, anyway. Something told him she could cram him into that armor whether he agreed to wear it or not.

"Good. Change in here. I'll be waiting outside."

With that, she left Tim to his own devices. He sighed, casting the outfit on the bed, stripping out of his Red Robin costume piece by piece.

"Here goes nothing..."

Tim found the seam in the back of the costume, slipping his legs in and hoisting it up. He fed his arms through the sleeves and his head through the neck hole. The suit sealed shut on its own, the enchantment already beginning to work its magic. He tugged at the collar of the bodice, finding it rather tight and uncomfortable, which was to be expected. The bra cups chafed against his toned chest, the leg holes slightly too large for his thighs. Not to mention the lack of room down there for his batarang.

"Hmmmpf!"

The air was knocked out of him. He grabbed at his waist, his face contorting with sheer agony. Revolting pops could be heard as his abdomen snapped inward. His torso crushed to create a more feminine waistline. Tim gasped for air, his chest compressing down as his shoulders became less broad.

"Hah... Hah..."

Tim grabbed at the collar of the suit, tugging at it to try and give him some more breathing room. He desperately felt for a seam in the back but found none. He quickly caught on to what Diana meant by "just put it on and everything will make sense." The disguise wasn't just the armor, the armor was changing him somehow. He was never one to quite comprehend magic. Science and logic were more in his wheelhouse.

"N-no going back now I guess..."

Red Robin muttered, wincing slightly. He felt like he just took a direct gut punch from Deathstroke. This was the last time he'd blindly agree to help a member of the Justice League. He was becoming whoever this armor belonged to and there wasn't anything he could do to stop it.

He watched his muscle begin to melt away along with his pride as his biceps slimmed down to fit in the sleeves. His chest followed suit, his pectorals converting to fat and quickly building up in the bra cups. His nipples softened, becoming more sensitive as tissue flooded beneath them. His newfound bust expanded and expanded until his breasts firmly pressed against the metal breast slots.

"Mmf!"

Tim moaned, but not out of pain that time. His voice sounded off, too. He placed both hands on his armor's chest, finding the cups filled with weight that wasn't there before. His face turned beat red.

"I have..."

Tim blushed, hearing his tone had dramatically risen in pitch. He felt his neck where the collar of the suit strained against his Adam's apple only to find that part of his body to be gone.

"I sound like a..."

In shock, the former boy wonder watched a lovely bronze shade spread across his skin. His body morphing to match his new complexion, becoming smooth and hairless as the changes continued.

His chin softened, cheekbones becoming more prominent as his lips became poutier. His dark hair spilled down passed his shoulders, the tiara darting up and landing squarely on his head. The blue shade in his irises turned amber, the bronze skin overtaking his old pale tone.

As his skin tone changed and spread to his hips, they expanded greatly to fit the armor's proportions, his thighs and rear puffing out with a healthy mixture of muscle and fat. His batarng only strained further as it was fiercely pressed against the crotch plate of the suit. His new athletic ass had taken up any spare space in the lower part of the armor.

"AH!"

Tim groaned in a feminine squeal. He tugged at the suit in a panic, trying to get his member some breathing room.

"GAH!"

Tim gasped, a weird level of pleasure jolting through his pelvis. In one fell swoop, his genitals shot back up inside of him and dissolved. His stomach churned as a womb was formed with the space granted by his freshly widened hips. His reproductive system inverted, sperm cells becoming egg cells as the last vestige of his true identity dissolved inside of him.

The new Wonder Girl clawed feebly at her crotch plate, unable to see her new genitals but she could make a pretty good educated guess as to what now rested between her thick thighs.

Carefully, she paced over to the full length mirror.

Tim made a few faces in the mirror, flabbergasted to see the Brazilian woman do the same.

"This is... me...?"

She furrowed her brows, hearing her new voice more clearly.

"Yara Flor. Wonder Girl. That is the identity you will be assuming for our mission."

Diana stood there in the doorway, arms folded.

"How do you feel?"

She looked her over.

"Um... weird..."

"Understandable. It's not everyday you become a woman."

"Y-yeah... I'm just having second thoughts... about this..."

Tim gestured to her breasts. Diana came closer and placed a hand on Tim's shoulder, looking her square in the eyes.

"I know this is a lot to ask of you, especially on such short notice. But I need your help. My people need your help. And for what it's worth, you are now imbued with the powers of an Amazon warrior. Wear this with pride."

Wonder Woman tapped the metal insignia above Tim's bust and offered a reassuring smile.