"Robotan" is a comedic anime series centered around a robot named Robotan, who is sent to Earth from Robot Kingdom to assist the Ohara family. The series blends slapstick humor and lighthearted adventures, often revolving around Robotan's attempts to help the Oharas while inadvertently causing chaos due to his clumsy and naive nature. Robotan's design is simple, resembling a small, round robot with a friendly demeanor, which contrasts with his often disastrous actions.

The Ohara family consists of the father, a salaryman; the mother, a homemaker; and their two children, a young boy and girl. Each episode typically features Robotan trying to assist with everyday tasks or solve problems, but his lack of understanding of human customs and his over-the-top enthusiasm frequently lead to humorous mishaps. Despite his failures, Robotan's good intentions and the family's patience create a dynamic of endearing, if chaotic, interactions.

The series also includes recurring characters from Robot Kingdom, such as Robotan's rival, Roboyon, who often competes with him in various challenges. These interactions add an extra layer of comedy and rivalry to the narrative. The episodic structure of the series ensures that each installment presents a self-contained story, often concluding with a resolution that restores order after Robotan's antics.

Themes of family, friendship, and perseverance are subtly woven into the series, as Robotan's unwavering optimism and the Ohara family's acceptance of his flaws highlight the importance of understanding and cooperation. The humor is primarily physical and situational, making it accessible to a wide audience, particularly younger viewers. The straightforward narrative and repetitive yet entertaining formula contribute to the series' charm, offering a nostalgic and light-hearted viewing experience.