Water Gun is demonstrated as the move that waters plants in Pokémon Pokopia.
Pokopia adapts Pokémon moves for creative and practical tasks. The official game description explains that the player can learn moves from Pokémon and use them to customize the environment. Water Gun is shown as a way to refresh thirsty plants, turning a familiar battle move into a gardening tool.
This system is part of the game’s central fantasy: the player controls a Ditto in human form but borrows useful abilities from Pokémon encountered in the world. Different moves can help with different construction, landscaping, or resource-gathering jobs.
Water Gun is easy to confuse with Hydro Pump because both are Water-type moves. Hydro Pump is a separate, more powerful move in the Pokémon series. Rain Dance also affects weather rather than functioning as a direct stream of water. In Pokopia’s gardening example, the named move is Water Gun.