Adjust his body to make him Batgirl.

"Error. Incorrect fitting proportions. Wardrobe malfunction," the Batcomputer hummed with an electronic buzz. Damian stood defiantly, arms crossed and foot tapping impatiently.

"What do you think you're doing, you imbecilic AI? Do you intend to undress me and examine the issue yourself?"

He was unsure if this was a glitch or a deliberate move by his father, but why was he compelled to don Barbara's costume?

"Negative. Initiating body modification protocols to match Barbara Gordon," the Batcomputer intoned. Damian found himself ensnared by the machine's unyielding metallic grip.

It dragged him towards a glass chamber, and before he could react, the robotic tentacles stripped him of the Batgirl costume. He was left clad only in a purple bra and panty set adorned with a black bat pattern. Unrelenting, the tentacles thrust Damian into the glass chamber.

"Release me immediately!"

Damian bellowed furiously, demanding freedom from the machine's clutches.

"Negative. Reshaping subject to match user profile: Barbara Gordon," the Batcomputer responded. A plume of gray gas emerged from above Damian's head, infiltrating his lungs. Coughing, Damian paused, realizing the voice he heard was not his own.

"I... am... Damian Wayne," he uttered hesitantly, each word transforming his voice into that of Barbara Gordon, A.K.A Batgirl.

As his voice altered, so too did his body. Damian's height increased by several inches, his limbs elongating to accommodate his growing frame. Despite the added length, his arms and hands became slender and delicate, his fingernails extending slightly. The muscular bulk Damian had worked tirelessly to develop and maintain diminished, his physique slimming down to match that of Barbara Gordon, though still retaining her strength and prowess. His shoulders narrowed and his waist contracted as his hips expanded, and Damian's once flat rear swelled, adopting the curvature and feminine proportions of Barbara Gordon's shapely behind.

A peculiar blend of pain and pleasure coursed through Damian as his testicles retracted into his pelvis. He cried out, both in agony and delight. His male member receded, giving way to a newly formed slit between his legs. The sensation of his former organ rubbing against his nascent clitoris was unbearable. Simultaneously, Damian felt a throbbing sensation in his chest as two C-cup breasts blossomed, his face flushing crimson from the foreign feeling.

His entire face began to twitch, the masculine Wayne features yielding to Barbara Gordon's visage. Damian's age advanced by six years, his dark brunette hair cascading down his back, its hue shifting to auburn. Even his hazel irises transformed, adopting a light blue hue.

"Body modification protocols complete. Resuming suit-up process," the computer announced. Damian had little time to process the change before being enveloped once more in the Batgirl suit. Now identical to Barbara Gordon, he found that the costume fit his new feminine form perfectly.

"Great, you made me a girl!"

"You have always been a female, Batgirl."

Damian frowned, going to cross his arms over his chest but his new chesticles got in the way, causing him to blush annoyedly.

"Shut up! I'm not-"

Suddenly, someone entered the Batcave...