Which character helps Ditto study the ruined environment in Pokémon Pokopia?

Professor Tangrowth helps Ditto study the ruined environment in Pokémon Pokopia.

Professor Tangrowth is a Tangrowth who has taken on the role of an environmental researcher. After Ditto arrives in the abandoned world, the two work together to restore habitats and investigate why humans and Pokémon disappeared.

The character is part of Pokopia’s story structure: restoration tasks are connected to a larger mystery about the damaged landscape. As Ditto helps Pokémon recover and rebuilds suitable places for them to live, the investigation gradually reveals more about the world’s past.

Professor Tangrowth should not be confused with Professor Oak, the human Pokémon researcher from the original Kanto games. Pokopia uses a Pokémon character in the professor role, while several other named characters, including DJ Rotom and Chef Dente, have different story functions.