Let's Go! Tamagotchi is an anime series focusing on the lives of Mametchi, Memetchi, Kuchipatchi, ChaMametchi, and their friends. The series premiered in Japan in December 2007, while an English dub was uploaded by Bandai in December 2008. It was originally uploaded a week before the release of the first movie in Japanese.

A new special episode that was distributed to those who purchase all three Blu-ray box sets of Sayonara Zetsubou Sensei series on January 31, 2012.

Someone out there is determined to see the fall of Weiss Kreuz, and it looks like they have found the perfect plan for it. The four assassins find themselves trapped in a deadly game of deceit, where the question of honor versus duty comes to surface. Now they must fight for their own reasons to survive--and there can be only be one victor in this field of death.

In "a certain era" on "a certain continent," banal things are happening. The construction of "Large-Scale Leisure Facilities" has demanded that all the villages are to be evicted. When these demands are denied, the village and its residents are obliterated. A boy named Chap once lived in tranquility, but that happiness soon came crumbling down. He decides to embark on a journey of revenge, but soon falls madly in love with the king's daughter, Princess Melora. In order to fulfill her selfish wishes, he gathers his friends in order to overcome the impossible.