- DC: "what if... Barbra Gordon fell into the vat of chemicals" (The Batman 2004 tv series) [given by 3mtsims from AO3]
it was before Pamela Isley (Poison Ivy) started her plans against the industries that are harming plants in Gotham City, Barbra Gordon was looking into Batman's known villain the Joker, wanting to find out who he really was, she had tracked down sightings and information on when he started appearing, leading her to an abandoned chemical plant, as she was looking the railing broke and she fell into a vat of chemicals, she was able to survive and climb out but was changed forever, her skin now pale, left eye golden colour and right eye a bright blue, and her hair had become a striking purple with light blue tips.
she had found an abandoned apartment, alone with the pain and looking into a mirror at her changed form, her mind started to break as she laughed, but then punched the mirror snapping out of it, retaining most of sanity, she knew she could not go home like this, so she started a new path, she gathered resources from junkyards and started creating gadgets, after self-training and creating a suit comprised of black and purple swirled jeans, black and blue leather tube top, leather fingerless gloves, purple combat boots with blue lining, silver chain utility belt, and a purple hoodie, with this she became the anti-hero MADeline.
she made her first appearance in saving Batman and fighting Poison Ivy, her crazy unpredictable tactics and nature kept even Batman on his toes with her fake and real mini bombs of paint and flash grenades, grappling hooks and spring boots allowing her to bounce around the place like a crazed pinball, after the battle she disappeared and reappeared all over the place, taking out bad guys and taking their wallets for cash. later down the line she ironically became friends with Harley Quin and then Poison Ivy, and during one insane battle with Joker and other villains that teamed up to take her, Batman and Robin out, helped by Ivy and Harley as they had gotten close to her, Batman had finally figured out who she was by a comment she made to Ivy, after then fight he confronted her asking if she was the missing Barbra Gordon, Ivy realising his words had truth also asked her, she was twitchy and tried to deny it but started to cry and when hugged by Ivy confirmed it.
after everything and seeing her father again they all agreed she wouldn't be able to live normally with her changes so instead she and the two now former criminals joined the bat family and worked together to keep the city, and the world, safe from bad guys and threats.