In Pokémon Pokopia, Bulbasaur teaches the player the move Leafage.
Leafage is used as an environmental ability rather than simply as a battle technique. Learning it lets the player add greenery and help restore parts of the damaged landscape, supporting the game’s central idea that Pokémon moves can be practical tools for rebuilding habitats.
Bulbasaur is an especially fitting teacher because it is a Grass- and Poison-type Pokémon associated with plants and a seed carried on its back. In the main Pokémon games, Leafage is a Grass-type attack, but Pokopia adapts the move to its world-building systems.
Leafage is easy to mix up with Vine Whip and Razor Leaf, two other Grass-type moves traditionally associated with Pokémon. However, the move specifically identified in Pokopia’s official game description as adding greenery to the environment is Leafage.