"Yattodetaman" is a science fiction anime series set in a futuristic world where the protagonist, Prince Iczer, is the rightful heir to the throne of the planet Remul. However, his claim is challenged by his evil uncle, God Neros, who usurps the throne and exiles Prince Iczer to Earth. Determined to reclaim his birthright, Prince Iczer adopts the identity of a young boy named Wataru and begins his quest to gather the seven sacred crystals scattered across Earth. These crystals hold immense power and are essential for restoring peace and justice to Remul.

Assisting Wataru in his mission are his loyal companions: Karen, a skilled fighter and strategist; Doberman, a robotic dog with advanced capabilities; and the Time Bokan, a versatile time-traveling vehicle that transforms into various forms to aid in battles. Together, they form the Yattodetaman team, dedicated to thwarting God Neros' plans and retrieving the crystals. God Neros, along with his minions, frequently dispatches agents to Earth to hinder Wataru's progress, leading to numerous confrontations and challenges.

The narrative unfolds through episodic adventures, with each episode typically focusing on the search for a specific crystal or the resolution of a conflict instigated by God Neros' forces. The series blends elements of action, adventure, and humor, with a strong emphasis on teamwork and perseverance. As the story progresses, Wataru and his allies face increasingly difficult trials, testing their resolve and unity. The overarching goal remains the restoration of Remul's rightful ruler and the defeat of God Neros' tyrannical regime.

Key themes in "Yattodetaman" include the struggle between good and evil, the importance of loyalty and friendship, and the pursuit of justice. The series maintains a balance between lighthearted moments and intense action sequences, appealing to a broad audience. The characters' growth and the evolving dynamics within the Yattodetaman team contribute to the narrative's depth, making it a compelling tale of heroism and determination.