Which Pixar film features a lonely robot on Earth?

WALL-E is the Pixar film that features a lonely robot on Earth. The 2008 movie begins with the last functioning waste-collecting robot working alone on a deserted, garbage-covered planet.

WALL-E’s name is an acronym for “Waste Allocation Load Lifter: Earth-Class.” Humanity abandoned Earth after pollution and consumer waste made it uninhabitable, leaving fleets of WALL-E robots behind to compact the rubbish. Centuries later, nearly all of them have stopped working, but one continues his routine and collects interesting objects in his small home.

His isolation changes when EVE, a sleek probe robot, arrives to search for evidence that Earth can support life again. WALL-E finds a living plant and follows EVE to the starliner Axiom, where the remaining humans have lived in space for generations. The story then expands from a quiet robot romance into a struggle to restore humanity’s connection with its home planet.

The other options are also robots in the film, but they do not fit the question as precisely. EVE visits Earth, M-O is a cleaning robot aboard the Axiom, and GO-4 serves as the ship’s first mate. WALL-E is the solitary Earth-based protagonist.