"Kero Kero Keroppi no Kyōryū ga Deta" is a children's anime series centered around the adventures of Keroppi, a cheerful and curious frog, and his friends. The story begins when Keroppi and his companions stumble upon a mysterious egg in the forest. Upon hatching, the egg reveals a baby dinosaur, which they name Dino. The group decides to care for Dino, embarking on a series of lighthearted and educational adventures as they learn about the dinosaur and its needs.

The narrative explores themes of friendship, responsibility, and discovery as Keroppi, along with his friends Keroleen, Koroppi, and others, navigate the challenges of raising a dinosaur in their small, idyllic town. Each episode typically features a new situation or problem, such as finding food for Dino, teaching it basic behaviors, or protecting it from misunderstandings with other townsfolk. The series emphasizes teamwork and problem-solving, with the characters often working together to ensure Dino's well-being.

The setting is a vibrant, colorful world filled with anthropomorphic animal characters, creating a whimsical and engaging backdrop for the story. The tone remains consistently upbeat and family-friendly, with a focus on simple moral lessons and positive interactions. While the series primarily targets a younger audience, its charm and straightforward storytelling make it accessible to viewers of all ages. The episodic structure allows for self-contained stories within the overarching narrative of Keroppi and his friends caring for Dino, ensuring a balance of continuity and variety throughout the series.