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Phineas T. Ratchet is the central antagonist of Blue Sky's second animated feature film Robots.

He is trying to take over Bigweld Industries through lies and manipulation so that he can recycle all outmoded and discarded robots in town as ingots to be used for upgrades. He is Madame Gasket's son and Rodney's arch-enemy along with Gasket.

He was voiced by Greg Kinnear. In the videogame adaptation of the film, he was voiced by Jim Meskimen.