Professor Tangrowth is associated with the post-apocalyptic Kanto setting in Pokémon Pokopia.
Professor Tangrowth is a Tangrowth who has taken responsibility for studying the abandoned environment. When Ditto arrives, the professor becomes an important guide and partner in investigating what happened to the humans and Pokémon who once lived there.
The character’s title is not the name of a conventional human professor from the main series. Instead, it reflects the game’s unusual world, where Pokémon are the central inhabitants and human society has disappeared.
Professor Tangrowth helps frame the restoration work as an environmental mystery. Ditto and the professor rebuild habitats, encounter unusual Pokémon, and uncover records left behind by humanity. Their investigation eventually reveals that humans departed for outer space after the planet became increasingly inhospitable.