What is gastrodon weak to?

Gastrodon is a dual-type Water/Ground Pokémon, which makes it weak to Grass-type moves. In addition to this, Gastrodon is also weak to Ice-type moves due to its Water typing. Its Ground typing makes it immune to Electric-type moves and resistant to Poison, Rock, and Steel-type moves. However, it is important to note that Gastrodon's weakness and resistance can be affected by its ability and the moves it has. Therefore, it is important to strategize accordingly while battling with Gastrodon.