Which Pokémon acts as Ditto’s scientific guide in Pokémon Pokopia?

Professor Tangrowth acts as Ditto's scientific guide in Pokémon Pokopia.

Ditto meets Tangrowth after taking a human-like form, and the Pokémon goes by the name Professor Tangrowth. He has dedicated himself to studying the damaged environment and investigating the mystery of why humans and Pokémon disappeared from the region.

The character is not a human professor from the main Pokémon games. That is a common mix-up because the franchise frequently uses human scientists such as Professor Oak, but Pokopia instead gives this role to a Pokémon character.

Professor Tangrowth helps frame the game's restoration mission. As Ditto repairs habitats and attracts Pokémon, the pair collect clues about the world's past. Their investigation eventually leads to a mysterious tower and an emergency evacuation protocol connected to the fate of humanity.