Tangrowth serves as the investigating professor in Pokémon Pokopia. This character is known as Professor Tangrowth and studies the damaged environment while helping Ditto uncover what happened to the missing humans and Pokémon.
Professor Tangrowth gives the opening story an investigative structure. After Ditto finds a trainer’s old Pokédex, it encounters Tangrowth, who has been examining the abandoned world. Together, they begin restoring habitats and following clues about why the region became uninhabitable.
The character is easy to confuse with Professor Oak because Oak is the famous Pokémon professor associated with the original Kanto games. Professor Tangrowth is a character created for Pokopia’s setting and story. Tangrowth itself is a Grass-type Pokémon introduced in Generation IV, but the professor’s role here is specific to this spin-off’s post-apocalyptic narrative.