A Smoggling is an enemy created by Sgt. Smoggler. Smogglings have the ability to turn your flowers into Black Flowers which will wither at dusk. Smogglings also have a larger counterpart called a Smogglob which can also create Black Flowers as well as Miasmo Flowers.
How to Defeat Them
There are many different ways to defeat a Smoggling such as;
Spraying a Smoggling with water until it explodes.
Tossing snacks at it.
Running it over with any vehicle.