Dr. Ronald Doofyblast

 is a doctor that is apparently a friend of Doofenshmirtz.

Personality
Doofyblast is easily upset and annoyed. When Doof can't tell whether Carl or Doofyblast are the real Doofyblast, Doofyblast grabs Carl's costume and rips it off angrily.

Doofenshmirtz
Doofyblast and Doofenshmirtz have apparently known each other for awhile, based on how Doofenshmirtz greeted Carl dressed as Doofyblast. However, Doofyblast is easily annoyed by his friend and destroys his inators when Carl defeats them.

Carl
In Doofyblast's current only appearance, Carl disguises himself as Doofyblast and then attacks the real one. Doofyblast is frustrated by this, so is not on good terms with Carl. Carl was actually offered the role of Doofyblast's nemesis.

Perry
In Platy-Power!, Doofyblast and Perry hardly interact, but Perry does kick him as Carl and Perry leave.

Appearances

 * Platy-Power! (First Appearance)