"Kaiketsu Zorori Mamoru ze! Kyōryū no Tamago" centers on the mischievous yet endearing fox-like creature, Zorori, whose dream is to become the "King of Mischief." Accompanied by his loyal boar companions, Ishishi and Noshishi, Zorori embarks on a new adventure when he discovers a mysterious dinosaur egg. The egg hatches into a baby dinosaur named Tonk, who quickly forms a bond with the trio. As Zorori and his friends take on the responsibility of caring for Tonk, they find themselves in a race against time to protect the young dinosaur from a group of poachers led by the villainous Dr. Demona.

The story unfolds as Zorori, Ishishi, and Noshishi navigate various challenges, including evading Dr. Demona’s relentless pursuit and ensuring Tonk’s safety. Along the way, they encounter a range of characters, both allies and adversaries, who add depth to the narrative. The series blends humor, adventure, and moments of heartfelt emotion as Zorori’s mischievous nature is tempered by his growing sense of responsibility toward Tonk. The dynamic between the characters drives the plot forward, with Zorori’s clever schemes and quick thinking often saving the day.

Themes of friendship, loyalty, and the importance of protecting the vulnerable are woven throughout the story. The series maintains a lighthearted tone while addressing the challenges of caring for a creature as unique as Tonk. The interactions between Zorori, Ishishi, Noshishi, and Tonk highlight their evolving relationships and the growth of each character. The narrative builds toward a climactic confrontation with Dr. Demona, culminating in a resolution that underscores the value of teamwork and compassion. The series offers an engaging mix of adventure and humor, appealing to a wide audience while staying true to the spirit of the "Kaiketsu Zorori" franchise.