Be a part of the momentous debut of your beloved Tamagotchi characters in their exclusive, full-length film! Delve into the world of Mametchi, a distinguished inventor residing on the wondrous Tamagotchi planet, whose newest creation - the Forwarding Machine - is finally complete. However, a mischievous Kuchipatchi intervenes during the initial trial, causing irreversible malfunctions that ultimately transport a young girl from Earth named Tanpopo to the Tamagotchi planet. Although ecstatic to finally encounter her esteemed Tamagotchi companions, Tanpopo is unable to travel home. Thankfully, Mametchi's parents vow to construct a rocket that will send her back to her original departure time. While eagerly anticipating her secure return, Tanpopo relishes her time with Mametchi on the Tamagotchi planet. But when a chain of peculiar events threaten the planet's well-being, Tanpopo and her newfound comrades realize they must band together not just to ensure her safe journey back to Earth, but also to safeguard the Tamagotchi planet.