BTAS version, with limited plant control, based on her experiments. Poison Ivy (and Clayface) as elementals in a way, are almost too powerful for Batman and the Batfamily to contend with as peak humans.
I liked her flavor of "crazy" and obsessiveness as it was portrayed in BTAS. Her sympathetic side shown through in her relationship with Harley and that's all the sympathy I need to see from her. They brilliantly portrayed her in relation to other villains (which we sorely need more of), whether Two-Face, Harley, or Joker.