Pamela Lillian Isley is still a high school student and obsessed with plants (she is also found to be the best friend of Barbara Gordon). Anything or anyone that harms Mother Nature is an enemy to Pamela. In order to carry out her plans against the industries that are harming plants in Gotham City, Isley hires Temblor to do her dirty work (since Isley running around with her friend, Barbara Gordon, would certainly turn too many heads). After Temblor's payment for his jobs does not come through and he learns his "boss" is really a teenage girl using a voice scrambler, he attempts to get rid of the annoyance in his life. During the fight, Batman shows up to detain Temblor, but before he can completely save her, Isley is exposed to a powerful dosage of plant growth accelerator ("Chloro-Mulch") and her transformation to Poison Ivy begins. For her first act, Poison Ivy captures Commissioner Gordon and attempts to take his life; before she can, however, Batman shows up. She quickly puts him under her control with a mind-controlling dust. Batgirl shows up to help free Gordon but finds herself overpowered by The Batman and Poison Ivy; despite this, Batgirl's able to snap Batman out of the mind control and together they defeat Poison Ivy. A period of time later, the mayor planned to tear down Gotham Park, and its plants in order to build a new hospital. His decision was despised by many people, including Poison Ivy. So, she hid Gotham City's most powerful citizens and infected them with a virus that made them think that they were enjoying nature. She also managed to capture the Penguin also. Meanwhile, plant clones took their place in the real world. Batman accidentally defeated the Penguin, only to find that it was not the Waddling Master Of Foul-Play at all, but his plant double. After rescuing Batgirl, they found Poison Ivy, and her plans were foiled. She had a cameo appearance in "Rumors" where she is one of the captive victims of Rumor. Also, in "The Batman/Superman Story" she is captured by Lex Luthor, whom she is able to obtain from her mind-controlled spores that were laced with kryptonite so he can control Superman.
Batgirls Begins Part 1 and 2
Fleurs Du Mal
Batman/Superman Story Part 1(Cameo)
Batman/Superman Story Part 2