one time my uncle bought a tumbleweed so every time one of his students made a bad joke he could roll it across the classroom
Leaf bug (Phyllium giganteum)
The constant wobbling as they move is a part of their disguise, making it seem as though the “leaf” is only moving because of a light breeze.
If you blow on one it will also shake around in the hopes of matching any actual surrounding leaves
this is a pokemon