Planty the Potted Plant is a plant working for the O.W.C.A. When Agent P did not show up on schedule to foil Heinz Doofenshmirtz's plan, Doofenshmirtz temporarily appointed Planty as his new nemesis. Doofenshmirtz engaged in a battle with Planty, resulting in severe damage to Doofenshmirtz Evil Incorporated.
Dr. Doofenshmirtz originally used Planty to fill the void when Perry wasn't showing up for his mission. He simply placed a newspaper hat on the top leaf of a nearby potted plant and pretended it was his nemesis, trapping him just like he traps Agent P. The potted plant was then named "Planty the Potted Plant" by Heinz. However, when Planty seemingly started to fight back after he was swung as a pendulum by the very trap he was caught in, Dr. Doofenshmirtz was defeated once more.
Planty was awarded a medal by Major Monogram for its actions in defeating Dr. Doofenshmirtz. This occurred, as Major Monogram phrased it, during one of their "darkest hours" ("No More Bunny Business").
Background Information
Although it was given the medal and accepted as an official member of the O.W.C.A., Planty has not been seen since, not even in the song Carpe Diem from "Rollercoaster: The Musical!", during which almost every character appeared.
It will be making an appearance in a future episode. [1]