Tangrowth was the only remaining resident when Pokémon Pokopia’s story began.
The game opens after the world has withered and humans have disappeared. Tangrowth lives alone in the wasteland until Ditto awakens and begins restoring the environment. This makes Tangrowth the first important Pokémon inhabitant in the rebuilding story.
As the player improves the landscape, creates structures, and makes the area more welcoming, additional Pokémon can be attracted and befriended. The contrast between Tangrowth’s lonely starting situation and the later community is central to Pokopia’s slow, restorative premise.
Tangrowth can be confused with other plant-based Pokémon, such as Trevenant or Gloom. The opening setup specifically identifies Tangrowth as the lone resident. It is not the player character: Ditto is controlled by the player, while Tangrowth is the first resident encountered in the desolate world.