Heneral Tuna, an alien cat from the Planet Mingming is tasked to invade Earth and accidentally crashlands in Barangay Hiraya in the Philippines.

[2] Prior to Heneral Tuna's release, the cultural agency launched a study with the National Economic and Development Authority (NEDA) in 2019 to determined values held among Filipinos in the country.

Liongoren said that the production team has considered two alternate concepts for a Filipino values-oriented series: a young Jose Rizal who time travels to the future, a robot built by an old scientist who learns how to be human, and a high school of tikbalangs and manananggals who stops eating Filipinos after learning more about them.

[4] According to Vergara, he wrote the cat protagonist with the mindset similar to a "child trying to explore the world" but maintains that the series could be enjoyed by an older audience.

[2] Heneral Tuna premiered online on October 15, 2021, on the Film Development Council of the Philippines's paid subscription service FDCP Channel as well as in Kumu.