"Robotan" is a comedic anime series centered around the misadventures of a small, clumsy robot named Robotan, who is sent to Earth from Robot Planet to observe human behavior. Upon arrival, Robotan is taken in by the Kindaichi family, where he becomes a part of their household. Despite his mission to study humans, Robotan often causes chaos due to his lack of understanding of Earth's customs and his own mechanical malfunctions. His antics frequently lead to humorous situations, much to the exasperation of the Kindaichi family, particularly the young boy, Hiroshi, who often bears the brunt of Robotan's mistakes.

The series is episodic, with each episode featuring Robotan encountering new challenges or misunderstandings as he navigates life on Earth. His interactions with the Kindaichi family, their neighbors, and other characters highlight his naivety and good-natured personality. Robotan's attempts to help often backfire, but his earnestness and innocence endear him to those around him. The show balances slapstick comedy with lighthearted moments, emphasizing Robotan's role as an outsider trying to fit into human society.

Key characters include Robotan, whose childlike curiosity and mechanical quirks drive much of the humor; Hiroshi Kindaichi, a typical young boy who often finds himself caught up in Robotan's schemes; and the rest of the Kindaichi family, who provide a grounded contrast to Robotan's antics. The series does not follow a continuous plot but instead focuses on standalone episodes that explore various aspects of Robotan's life on Earth, making it accessible for casual viewing. Through its simple yet entertaining premise, "Robotan" offers a light-hearted look at the challenges of adapting to a new world and the bonds formed through shared experiences.