Pamela Isley (Batman vs. TMNT)

Pamela Isley, better known as Poison Ivy, is a notorious criminal in who is obsessed with plants. At some point prior to the events of Batman vs. Teenage Mutant Ninja Turtles, she was captured and placed in, where she was held with several other dangerous individuals.

When the took over the Asylum, Isley was one of several individuals he freed, before spraying them with. Isley became a plant mutant, a change that she very much enjoyed.

When, and  took refuge in a room in the asylum, they found themselves confronted with Isley. She attempted to kill them, but found that they were just a few inches outside her reach, and she was unable to move closer because of her roots. She became agitated as the Turtles and the boy simply exited the room, remaining outside her grasp.

Though it is not shown, Isley was presumably demutated by the police after the was found to work.