Give me ONE (1) good reason why flying is supereffective against grass
>inb4 muh tornadoes
yeah Thunder and Tsunamis cut down trees like it was fucking nothing yet Electric and Water are not SE against grass.
If a plant has its shit blown by a small breeze it is either
1. dead
2. meant to spread it shit like pollen with that wind

so technically, if anything, grass should RESIST flying