Phineas T. Ratchet is the secondary antagonist of Robots and an arch nemesis to Rodney. In the film, he takes Bigweld's place at an annual dance extravaganza. After reducing Bigweld to a retired figurehead, Ratchet rises to head of Bigweld Industries, stopping the sale of spare parts in order to push expensive upgrades (and changing the company slogan to "Why be you, when you can be new?"). When Rodney gets inside of Bigweld Industries, he and Wonderbot are booted out by him. Rodney recruited the Rusties and Aunt Fanny to defeat of Ratchet and his mother in the climax of the film. Moments after his mother is killed, Ratchet is launched into the ceiling, losing his upgrades and coming to rest hanging alongside his father.
- Ratchet will become the enemy of Thomas, Twilight and their friends in Thomas and Twilight Sparkle's Adventures of Robots. (where he along with Gasket will target Thomas and the engines for their metal to make further upgrades.)