Professor Destructicon is a minor antagonist in the Disney Channel series Phineas and Ferb, being introduced in the episode "One Good Scare Ought to Do It!" and later serving a cameo in "Rollercoaster: The Musical!". He was known by his friends as "Kevin" and was Dr. Heinz Doofenshmirtz's mentor a long time ago.
He was voiced by Danny Jacobs.
One Good Scare Ought to Do It!
Despite being Doofenshmirtz's mentor, Professor Destructicon happens to be even more incompetent and dimwitted than his student. Before he was arrested (the reason behind his arrest remains unknown), Destructicon attempted to complete his grand scheme of setting fire to the sun. When he asked Doofenshmirtz to complete his grand scheme, Doofenshmirtz showed some actual common sense on this by explaining that the sun is just a big ball of fire and the entire plan is completely redundant. Realizing that Doofenshmirtz is right, Destructicon asks Heinz to blow up his evil lair located on a tiny island instead. Though Doofenshmirtz's nemesis Perry the Platypus manages to foil Doof's attempt to blow Destructicon's lair, Doofenshmirtz manages to escape away by throwing off the bomb (which was supposed to blow up the lair) off his plane, forcing an angry Perry to let him go, seeing that he has failed to defeat Doofenshmirtz for the first time. As such, Destructicon's lair remains untouched.
Rollercoaster: The Musical!
Destruction made a cameo appearance as he is seen dancing with The Regurgitator in their prison cell during the final number.