Emperor Heinz Doofenshmirtz (Alternate Future)

As of the year 2029 in an alternate future, Dr. Heinz Doofenshmirtz has taken power as the ruler of the Tri-State Area, which is entirely severed from the Union of the United States of America. He rules his territory by using genetically-engineered soldiers and zombie-like cyborgs and keeps it safe from enemy attack (even attempts from other countries) until 2030, when he is put to justice relatively peacefully by Phineas, Ferb, Isabella, Baljeet, Buford, Irving, Candace, and Jeremy from 2014 in An Interplexing Future. After a change in heart from being forgiven by Isabella, who is nearly assimilated by his cyborgs, he ends his own rule and briefly travels back to 2014 to warn his past self about how bad things will be if he continues to be so evil (and is apparently successful). He is briefly mentioned in Love's Full Blossom, where Phineas reminds Isabella of him and how the world will be much safer (as of 2025) since he had warned his past self.

Creator's Comments (Tiberius64)

 * "As with every version of Doof, this one had a horrible childhood and felt the need to avenge himself not only on society, but on a larger group of innocents. It only took some forgiveness and love from someone whom he had indirectly harmed and threatened...he saw what he had done and made an effort to change his life around entirely and undo all damage he had done."
 * "In the pic, I just put him in a suit because I thought it looked a bit...classier than some evil-looking robe. Besides, his success had only been recent in his time, so I can imagine that it would've been a while before he got too fancy with the wardrobe."